Chatham tides today
- Tide now 1.5 ft ↓ falling · low 11:05 pm (-0.3 ft)
- Best time tomorrow 3:20–4:20 am good day · 7/10
- Beach day Not today Not a beach day · 0/10
- Waves · water 1.2 ft · 55 °F smooth · 5.3 s from the east-southeast
- Wind · air 6 mph · 47 °F from the SSW, gusts 13 · partly cloudy
- Sun 7:07 am–5:39 pm 10 h 32 min of daylight
- Moon 91% · 7:09 pm waning gibbous · rises at 7:09 pm
- Diving tomorrow 10:30 am–1:00 pm good day · 8/10
Today in Chatham there are high tides at 3:26 am (3.4 ft) and 3:36 pm (3.9 ft) and low tides at 10:27 am and 11:05 pm. Tide coefficient 85. Right now the tide is falling toward the low tide at 11:05 pm. The sun rises at 7:07 am and sets at 5:39 pm: 10 h 32 min of daylight. The moon is 91% illuminated (waning gibbous) and rises at 7:09 pm. Major solunar periods run from 1:14 am to 3:14 am and from 1:45 pm to 3:45 pm. The next spring tides arrive from October 26 to 28. The sea is smooth, with 1.2 ft waves. There's a light breeze from the south-southwest (6 mph). Partly cloudy, 47 °F.
Fishing in Chatham today
Best time to fish
Solunar activity today: high- High tide at 3:36 pm, coefficient 85
- Major period 1:45–3:45 pm
- Steady pressure (30.42 inHg), light onshore wind (8 mph) and calm sea (1.2 ft waves)
- Waning gibbous: a bit more activity than at the quarters
- Highest tide coefficient today: 85 (average tides)
Your day at a glance
The best window, 2:40 pm to 3:50 pm, combines the 3:36 pm high tide, a major period and a light onshore breeze. Also worth a try from 9:50 am to 10:50 am, with the 10:27 am low tide, moonset and a light onshore breeze, though with rising pressure. Also worth a try from 2:30 am to 3:10 am, with the 3:26 am high tide and a major period, though with rising pressure.
Species with the most records nearby: Atlantic mackerel, Atlantic cod, winter flounder and haddock. October is one of the months when these are seen most: winter flounder and longfin inshore squid. What you can catch
Beach day in Chatham
Is it a beach day?
Rip current risk today: low · tomorrow: low (NWS)
Rip currents can still form near jetties, piers and reefs: swim near a lifeguard.
- Sun and clouds
- Onshore breeze (8 mph)
- Calm for swimming: 1.3 ft waves
- UV 3 (moderate): SPF 30 sunscreen
- Low tide at 10:27 am: more sand
- Feels like 51 °F: chilly for the beach
Today, hour by hour
- Swimming Calm · 1.3 ft
1.3 ft waves: calm for swimming. Always follow the lifeguard's flags.
- Water 55 °F
Very cold: ease in and keep swims short.
- Sun & sunscreen UV 3 · SPF 30
Max UV 3 (moderate): SPF 30 sunscreen, reapplied every 2 hours.
- Wind 8 mph
Onshore breeze (8 mph).
- Tide & sand 11:05 pm
Low tide at 10:27 am and 11:05 pm: that's when there's the most sand. High tide at 3:26 am and 3:36 pm.
We don't have data on jellyfish, sargassum or beach closures: ask the lifeguard or check with the local beach authority. How it works · The next 7 days
Beaches near Chatham
Map: OpenFreeMap · © OpenMapTiles · © OpenStreetMap contributors
- Lighthouse Beach 1.2 mi · SE
- Restrooms
- Parking
- No dogs
- Hardings Beach 2.1 mi · SW
- Restrooms
- Parking
- Ridgevale Beach 2.5 mi · W
- Restrooms
- Parking
- Strong Island Beach 2.8 mi · N
- Forest Beach 3.3 mi · W
- Parking
- Red River Beach 4.3 mi · W
- Parking
- Dogs allowed
- Bank Street Beach 5.9 mi · W
- Restrooms
Water quality: check the official beach advisories for Massachusetts (Massachusetts Department of Public Health).
Named beaches within 6.2 mi, nearest first. Amenities from OpenStreetMap: some may be missing or out of date. View on OpenStreetMap · Add or fix on OpenStreetMap
Beaches and amenities: © OpenStreetMap contributors (ODbL).
Webcams near Chatham
Webcams provided by windy.com — add a webcam
Tides in Chatham
Today's high and low tides
- ▲ High tide 3:26 am 3.4 ft · coef. 85
- ▼ Low tide 10:27 am 0.0 ft
- ▲ High tide 3:36 pm 3.9 ft · coef. 85
- ▼ Next low tide 11:05 pm -0.3 ft
↓ Falling The tide is falling. 3 h 18 min to low tide at 11:05 pm.
Tide coefficient 85 for the 3:26 am high tide and 85 for the 3:36 pm high tide. Average coefficient. The water rises and falls 4.3 ft between the highest high and the lowest low: a small range for this place. 70 is an average tide here; 90 and above means spring tides; below 45, neap tides. What is the tide coefficient?
2026 extremes: the highest tide of the year is on May 18 (4.1 ft) and the lowest, on December 25 (-0.5 ft).
Semidiurnal: two high and two low tides a day, of similar height.
Heights above mean lower low water (MLLW), the zero of US nautical charts. Astronomical prediction: wind and air pressure can raise or lower the water by a few inches, and more in a storm. Not for navigation. MLLW
Tide coefficient and range in October
The biggest tides of the month came from October 26 to 29 (coefficient 85, 4.3 ft range). The smallest, from October 18 to 19 (coefficient 48, 2.5 ft).
Tide and solunar table · this week
| Day | Sun | Tide 1 | Tide 2 | Tide 3 | Tide 4 | Coef. | Moon | Major periods | Activity |
|---|---|---|---|---|---|---|---|---|---|
| Today, Wed 28 | 7:07 am · 5:39 pm | High tide 3:26 am · 3.4 ft | Low tide 10:27 am · 0.0 ft | High tide 3:36 pm · 3.9 ft | Low tide 11:05 pm · -0.3 ft | Coef. 85 | 91% | Major periods 1:14 am · 1:45 pm | High |
| Thu 29 | 7:08 am · 5:38 pm | High tide 4:16 am · 3.4 ft | Low tide 11:16 am · 0.1 ft | High tide 4:27 pm · 3.9 ft | Low tide 11:56 pm · -0.3 ft | Coef. 84 | 84% | Major periods 2:18 am · 2:50 pm | Medium |
| Fri 30 | 7:10 am · 5:37 pm | High tide 5:09 am · 3.3 ft | Low tide 12:08 pm · 0.2 ft | High tide 5:21 pm · 3.8 ft | — | Coef. 80 | 74% | Major periods 3:22 am · 3:54 pm | Medium |
| Sat 31 | 7:11 am · 5:36 pm | Low tide 12:51 am · -0.2 ft | High tide 6:07 am · 3.2 ft | Low tide 1:05 pm · 0.3 ft | High tide 6:19 pm · 3.7 ft | Coef. 75 | 63% | Major periods 4:25 am · 4:54 pm | Medium |
| Sun 1 | 6:12 am · 4:34 pm | Low tide 1:50 am · 0.0 ft | High tide 6:09 am · 3.1 ft | Low tide 1:07 pm · 0.4 ft | High tide 6:24 pm · 3.5 ft | Coef. 70 | Last quarter | Major periods 4:22 am · 4:49 pm | Medium |
| Mon 2 | 6:13 am · 4:33 pm | Low tide 1:53 am · 0.1 ft | High tide 7:15 am · 3.1 ft | Low tide 2:14 pm · 0.4 ft | High tide 7:32 pm · 3.4 ft | Coef. 67 | 41% | Major periods 5:15 am · 5:40 pm | Medium |
| Tue 3 | 6:14 am · 4:32 pm | Low tide 2:56 am · 0.1 ft | High tide 8:21 am · 3.2 ft | Low tide 3:21 pm · 0.4 ft | High tide 8:40 pm · 3.3 ft | Coef. 67 | 30% | Major periods 6:04 am · 6:27 pm | Medium |
▲ high tide · ▼ low tide · heights above MLLW. Major periods: start time; they last 2 hours. Activity: based on the moon phase and the solunar periods.
Where this tide comes from
Tides from the Pleasant Bay station (NOAA), 3.9 mi from Chatham. Times and heights are its predictions. It is a NOAA subordinate station: its times and heights come from the Boston reference station with the official corrections.
Station data attribution: Slackwater database (https://github.com/openwatersio/slackwater-database)
The sea at Chatham
Sea stateSea state: smooth
The waves you may find
- Most commonMost common0.6 ft
- Significant1.2 ft
- Highest expectedHighest2.6 ft
One wave in seven is higher than the significant height, and about 3 times a day one reaches 2.6 ft. Before heading out, expect waves of up to 2.6 ft.
Wind on the coast and offshore
The model doesn't separate offshore wind here: it's the same as on the coast.
Cross-shore wind. The coast faces southeast and the wind blows along the shore: drift and current run parallel to the beach.
Wave height, next 7 daysWaves, next 7 days
Waves build over the next few days. The biggest waves arrive on Saturday 31: 2.7 ft with a period of 4 s, from the north-northwest (slight).
Water temperature
Water temperature →Water temperature changes how fish behave: in very cold or very warm water they feed less. The water is steady these days, with no sudden changes.
Water about normal for late October.
Satellite: NASA MUR (JPL MUR MEaSUREs, PO.DAAC), doi:10.5067/GHGMR-4FJ04. Sources and licenses
Water temperature →Forecast from Open-Meteo (CC BY 4.0) with models from ECMWF, NOAA, Météo-France, DWD, Copernicus Marine and CAMS. Updated at 7:47 pm (local time).
Nearest buoy
This is a real measurement of the sea, not a forecast. Data from station 44020, NOAA National Data Buoy Center (public domain).
Surf in Chatham today
Surf today
Poor- 1.0–1.6 ft surf at the shore, small: good for learning or a longboard
- 1.0 ft swell at 8 s from the east-southeast, short: weak, messy waves
- Almost no wind (2 mph): glassy water
- Falling tide (low tide at 10:27 am)
Rip current risk today: low · tomorrow: low (NWS)
Rip currents can still form near jetties, piers and reefs: swim near a lifeguard.
Surf height from the NWS, today: 2.0 ft
- Light: First light 6:39 am · sunrise 7:07 am · sunset 5:39 pm · last light 6:08 pm
- Tide: high 3:26 am (3.4 ft), low 10:27 am (0.0 ft), high 3:36 pm (3.9 ft) and low 11:05 pm (-0.3 ft). Every break has its own tide: some work at low tide and others at high tide. The tide doesn’t change the score here.
- Water at 54.3 °F: a 5/4 fullsuit with booties (and a hood if it’s windy).
- Energy: 13 kJ · Low power
Today’s surf at a glance
The best window, 7:00 am to 10:00 am, has glassy water, though with small waves and a short-period swell.
An estimate for this stretch of coast, not for a specific break: every beach or reef works its own way (its tide, bottom and angle). Check it when you get there.
Diving in Chatham today
Diving and snorkeling today
Likely visibility: good- Slack water around low tide (10:27 am): little current from 9:00 am to 11:10 am
- 1.0 ft swell at 8 s from the east-southeast: barely any surge
- Light onshore wind (6 mph)
- 0.9 mph current toward the southwest (model)
- Sun high: more light underwater
- Slack water today: high tide 3:26 am (2:20–4:50 am), low tide 10:27 am (9:00–11:10 am), high tide 3:36 pm (2:40–5:00 pm) and low tide 11:05 pm (9:40–11:50 pm)
- Likely visibility: good. The sea has been calm and there's been little rain. Based on the last 24 hours of data.
- Water at 54.3 °F: a 7 mm semi-dry suit, with hood, gloves and booties.
- Snorkeling: doable, with some waves or wind.
- Night dive: dark from 6:08 pm. Waning gibbous (91%), rising at 7:09 pm: a bright night.
Your diving day at a glance
The best window, 10:30 am to 12:30 pm, combines slack water at low tide, little swell, light wind and the sun high, though with current. Also worth a look from 3:30 pm to 5:40 pm, with slack water at high tide, little swell and light wind, though with current.
Slack water comes from the tide: in inlets, channels and between islands the water can keep running for an hour or two after. Ask the local dive shop.
Never dive alone and check with the local dive shop: this rating is a guide, not a substitute for a professional.
Dive sites, wrecks and dive shops nearby
Map: OpenFreeMap · © OpenMapTiles · © OpenStreetMap contributors
- SS Pendleton 6.6 mi
- SS James Longstreet 11 mi
- Wreck 8.8 mi
- Wreck 9.2 mi
- Wreck 9.4 mi
- Wreck 11 mi
- Wreck 11 mi
- Wreck 11 mi
- Harwich reef 6.9 mi
- Monomoy National Wildlife Refuge 6.6 mi
- Cape Cod National Seashore 11 mi
- Adventure Diving of Cape Cod 11 mi
Within 12 mi. Some may be missing or closed; marine reserves usually need a permit. Open the map on OpenStreetMap · Missing one? Add it to OpenStreetMap
Wreck and reef positions are approximate and not for navigation; a wreck’s depth runs from the top of the hull to the seabed.
Sites: © OpenStreetMap contributors (ODbL). US wrecks: NOAA electronic navigational charts (ENC), a U.S. Government work; not for navigation. Artificial reefs: NOAA and BOEM (MarineCadastre.gov), a U.S. Government work.
Weather in Chatham
Now in Chatham
- Low / high
- 33 / 56 °F
- Rain
- 0.00 in · 1%
- Clouds
- 58%
- Humidity
- 75%
- Dew pointDew point
- 40 °F
- Visibility
- 12 mi
- UV indexUV
- 0 · low
- Air qualityAir
- Good · 36
- Saharan dust
- No
Pressure and fishing
- ↗ RisingRising Anglers say fish bite less for a while
- → SteadySteady · now Anglers expect normal activity
- ↘ FallingFalling Anglers say fish feed more before the change
Steady now (+0.01 inHg in 3 hours). Over the next 48 hours: −0.35 inHg. Steady pressure: anglers expect normal activity. Fast changes, either way, tend to affect fishing.
Today, hour by hourHour by hour
Bars: mean wind. Dashed line: gusts. Arrows point where the wind blows to.
| Time | 12:00 am | 3:00 am | 6:00 am | 9:00 am | 12:00 pm | 3:00 pm | 6:00 pm | 9:00 pm |
|---|---|---|---|---|---|---|---|---|
| Sky | Clear | Clear | Clear | Mainly clear | Overcast | Partly cloudy | Partly cloudy | Mainly clear |
| Temperature | 37° | 33° | 35° | 46° | 56° | 56° | 49° | 47° |
| Wind (mph) | 1 NNW | 4 WSW | 3 WNW | 1 NW | 6 S | 8 S | 6 SW | 7 SSW |
| Gusts | 2 | 4 | 4 | 4 | 6 | 10 | 13 | 15 |
| Waves | 1.6 ft | 1.4 ft | 1.4 ft | 1.2 ft | 1.2 ft | 1.2 ft | 1.2 ft | 1.2 ft |
| Rain | 0.00 in | 0.00 in | 0.00 in | 0.00 in | 0.00 in | 0.00 in | 0.00 in | 0.00 in |
- 9:00 pm 47° 7 SSW 1.2 ft
- 12:00 am 48° 7 SSW 1.2 ft
- 3:00 am 46° 6 SW 1.2 ft
- 6:00 am 46° 7 SW 1.2 ft
- 9:00 am 56° 7 SW 1.3 ft
- 12:00 pm 61° 12 SSW 1.6 ft
- 3:00 pm 60° 13 SSW 1.8 ft
- 6:00 pm 56° 12 SSW 1.8 ft
Next 14 daysComing days
| Day | Sky | Low / high | Max wind | Max wave | High tides |
|---|---|---|---|---|---|
| Today · 28 | 33 / 56 °F | 8 mph SSW | 1.6 ft | 3:26 am · 3:36 pm | |
| Thu 29 | 45 / 61 °F | 14 mph SW | 1.8 ft | 4:16 am · 4:27 pm | |
| Fri 30 | 49 / 64 °F | 15 mph W | 2.5 ft | 5:09 am · 5:21 pm | |
| Sat 31 | 42 / 51 °F | 17 mph NNW | 2.7 ft | 6:07 am · 6:19 pm | |
| Sun 1 | 42 / 55 °F | 9 mph WSW | 1.3 ft | 6:09 am · 6:24 pm | |
| Mon 2 | 48 / 59 °F | 10 mph WSW | 1.1 ft | 7:15 am · 7:32 pm | |
| Tue 3 | 49 / 58 °F | 11 mph ENE | 1.0 ft | 8:21 am · 8:40 pm | |
| Wed 4 | 48 / 58 °F | 13 mph SE | 2.7 ft | 9:23 am · 9:46 pm | |
| Thu 5 | 49 / 58 °F | 14 mph ESE | 2.3 ft | 10:21 am · 10:47 pm | |
| Fri 6 | 50 / 59 °F | 19 mph ESE | 3.1 ft | 11:12 am · 11:40 pm | |
| Sat 7 | 46 / 56 °F | 13 mph NW | 3.7 ft | 11:57 am | |
| Sun 8 | 46 / 53 °F | 15 mph NW | 3.7 ft | 12:28 am · 12:38 pm | |
| Mon 9 | 49 / 51 °F | 9 mph NNW | 1.6 ft | 1:12 am · 1:17 pm | |
| Tue 10 | 50 / 52 °F | 12 mph ENE | 1.4 ft | 1:53 am · 1:55 pm |
- Thu 29 Clear sky 45° / 61° 1.8 ft
- Fri 30 Overcast 49° / 64° 2.5 ft
- Sat 31 Mainly clear 42° / 51° 2.7 ft
- Sun 1 Clear sky 42° / 55° 1.3 ft
- Mon 2 Mainly clear 48° / 59° 1.1 ft
- Tue 3 Overcast 49° / 58° 1.0 ft
- Wed 4 Partly cloudy 48° / 58° 2.7 ft
Each day comes from the best model covering this spot: regional ones first (HRRR and NBM in the U.S., AROME, ICON-EU), then ECMWF; day 16, NOAA GFS. Waves: Météo-France up to day 10, then ECMWF WAM, coarser and further offshore. High tides: our own tide calculation.
- The models Partly agree · medium confidence: unsure about temperature on Friday 30. See the models →
- Outlook Next few weeks, compared with normal: a bit warmer, normal rain and a slightly warmer sea. See the outlook →
- Normal Today, normal highs for late October (58 °F). Climate by month →
Forecast from Open-Meteo (CC BY 4.0) with models from ECMWF, NOAA, Météo-France, DWD, Copernicus Marine and CAMS. Updated at 7:47 pm (local time).
The sun in Chatham
Sunrise and sunset
- First light 6:06 am
- Full dark 6:41 pm
- Civil dawn 6:39 am
- Civil dusk 6:08 pm
- Solar noon 12:24 pm (35° high)
- Daylight 10 h 32 min (−3 min)
- Evening golden hour 5:00 pm
- Full dark 6:41 pm
Golden hour and the day-night map
Today the sun is 92,355,114 mi away and looks 32′ 11″ across.
The moon in Chatham
Moon phase and position
Today the moon is 226,429 mi away and looks 32′ 47″ across.
Solunar periods
Today's activity: high- 1:14–3:14 am Major · the moon passes overhead · high activity
- 1:45–3:45 pm Major · the moon passes underfoot · high activity
- 9:49–10:49 am Minor · moonset · medium activity
- 6:39–7:39 pm Minor · moonrise · medium activity
According to solunar theory, fish feed more when the moon passes overhead or underfoot (major periods, about 2 h) and when it rises or sets (minor periods, 1 h). It works best around new and full moon.
Upcoming moon phases
2026 moon calendar →- Last quarter Sun, Nov 1 · 3:29 pmNov 1 in 4 days
- New moon Mon, Nov 9 · 2:03 amNov 9 in 12 days
- First quarter Tue, Nov 17 · 6:48 amNov 17 in 20 days
- Full moon Tue, Nov 24 · 9:54 amNov 24 in 27 days
Perigee on October 28, 226,426 mi away, coinciding with the spring tides from October 26 to 28: they will be stronger than usual.
Where to fish in Chatham
Piers, ramps and tackle shops nearby
Map: OpenFreeMap · © OpenMapTiles · © OpenStreetMap contributors
- Mill Pond Pier 0.4 mi
- Chatham Fish Pier 0.6 mi
- Jetty 1.6 mi
- Jetty 1.8 mi
- Boat ramp 0.4 mi
- Boat ramp 0.9 mi
- Boat ramp 1.1 mi
- Stage Harbor Marine 0.9 mi
- Outermost Harbor Marine 1.2 mi
- Cape Fishermen's Supply 0.4 mi
- Chatham Fishing Pier 0.6 mi
- Fuel dock 1.2 mi
Within 9.3 mi. A spot may be missing or closed. Open the map on OpenStreetMap · Missing one? Add it to OpenStreetMap
Spots: © OpenStreetMap contributors (ODbL) and Overture Maps.
Water depth
Shallow, gradualShallow, gradual bottom: 11 ft at 0.45 mi.
From the shoreline (0.8 mi from Chatham) out to sea, heading southeast.
How far from shore
- 16 ft deepnot within 0.45 mi
- 33 ft deepnot within 0.45 mi
- 66 ft deepnot within 0.45 mi
- 164 ft deepnot within 0.45 mi
For fishing, swimming and diving
- Shore fishing. Very shallow: the water doesn't reach 16 ft within 0.45 mi. Cast far from the beach, ideally around high tide.
- Swimming. A very gentle way in with plenty of shallow water, good for kids. At low tide the water can be far out.
- Diving. Shallow: the water doesn't reach 33 ft within 0.45 mi. For deeper dives, take a boat farther out.
There is little open water ahead: in a cove or small bay, cells of about 300 ft cannot show the bottom well near the rocks. There is land ahead (an island, a headland or the far shore) 0.45 mi out.
Source: NOAA U.S. Coastal Relief Model (public domain), cells of about 300 ft; depth below mean sea level. For reference only: not for navigation or anchoring.
Nearest lighthouse
Chatham Light 0.9 mi southeast
- Light
- 2 white flashes every 10 s · Fl(2) W 10s
- Range
- 24 nautical miles (28 mi)
- Light height
- 79 ft above sea level
- Tower height
- 48 ft
- Built
- 1808
Other lighthouses nearby: Stage Harbor Light (2.0 mi southwest), Stage Harbor Light (2.1 mi southwest).
Data from Wikidata. For reference only: not for navigation. Wikipedia · Wikidata · Sources and licenses
Tides near ChathamTides nearby
- West Chatham1.6 mi
- Harwich Port6.2 mi
- Northwest Harwich7.4 mi
- Orleans7.6 mi
- Brewster8.3 mi
- Dennis Port8.9 mi
- South Dennis10 mi
- Eastham10 mi
- West Dennis11 mi
- East Dennis11 mi
Chatham at a glance
- Town or city of about 1,421 people. Coordinates: 41.682° N, 69.960° W.
- It is 73 mi southeast of Boston, the main place in Massachusetts. The sun rises 6 min earlier and sets 3 min earlier than in Boston.
- The nearest tide station, Pleasant Bay, is 3.9 mi to the north.
- Its coast faces southeast.
- Beaches and harbors nearby: Stage Harbor (1.7 mi), Chatham Harbor (1.9 mi), Chatham Inner Harbor (1.9 mi), Harding Beach (2.1 mi).
Questions about ChathamQuestions
What time is high tide today in Chatham?
Today in Chatham there are high tides at 3:26 am (3.4 ft) and 3:36 pm (3.9 ft) and low tides at 10:27 am and 11:05 pm. Tide coefficient 85.
What time is sunset today in Chatham?
At 5:39 pm. There is light until the end of civil twilight, at 6:08 pm.
What time is sunrise tomorrow in Chatham?
At 7:08 am. First light comes at 6:07 am.
What phase is the moon today?
Waning gibbous, 91% illuminated. New moon on Mon, Nov 9 · 2:03 am.
When are the next spring tides?
From October 26 to 28, together with the lunar perigee: they will be stronger than usual.
What are today's solunar periods?
Major 1:14–3:14 am, Minor 9:49–10:49 am, Major 1:45–3:45 pm, Minor 6:39–7:39 pm. Today's activity is high.
What's the weather like today in Chatham?
Overcast, from 33 °F to 56 °F, with a light breeze from the south-southwest (6 mph) and a 1% chance of rain.
How is the sea today in Chatham?
Smooth (Douglas 2): 1.2 ft waves with a period of 5.3 s from the east-southeast. The water is 54.5 °F.
When is the best time to visit Chatham?
The best time to visit Chatham is from July to August: highs of 76 °F, about 9 rainy days a month and 8 hours of sunshine a day.
Can I use this data for navigation?
No. These are predictions for fishing and leisure; for navigation, use the official publications.
Where this data comes from
Tide: NOAA station Pleasant Bay (public domain), via Slackwater database. Sun and moon: our own calculation with astronomy-engine. Places: GeoNames (CC BY 4.0). Coastline: © OpenStreetMap contributors (ODbL).