Green Harbor tides today
- Tide now -1.0 ft ↑ rising · high 1:55 am (9.4 ft)
- Best time tomorrow 6:50–7:50 am good day · 7/10
- Beach day Not today Not a beach day · 0/10
- Waves · water 1.1 ft · 56 °F smooth · 4.9 s from the northeast
- Wind · air 5 mph · 47 °F from the SSW, gusts 8 · mainly clear
- Sun 7:11 am–5:42 pm 10 h 31 min of daylight
- Moon 91% · 7:10 pm waning gibbous · rises at 7:10 pm
- Diving tomorrow 7:10–8:50 am great day · 9/10
Today in Green Harbor there are high tides at 1:06 am (9.5 ft) and 1:18 pm (11.0 ft) and low tides at 7:04 am and 7:43 pm. Tide coefficient 84. Right now the tide is rising toward the high tide at 1:55 am. The sun rises at 7:11 am and sets at 5:42 pm: 10 h 31 min of daylight. The moon is 91% illuminated (waning gibbous) and rises at 7:10 pm. Major solunar periods run from 1:17 am to 3:17 am and from 1:48 pm to 3:48 pm. The next spring tides arrive from October 26 to 28. The sea is smooth, with 1.1 ft waves. There's a light breeze from the south-southwest (5 mph). Mainly clear, 47 °F.
Fishing in Green Harbor today
Best time to fish
Solunar activity today: high- High tide at 1:18 pm, coefficient 84
- Major period 1:48–3:48 pm
- Steady pressure (30.45 inHg), light onshore wind (5 mph) and calm sea (1.4 ft waves)
- Waning gibbous: a bit more activity than at the quarters
- Highest tide coefficient today: 84 (average tides)
Your day at a glance
The best window, 1:30 pm to 2:20 pm, combines the 1:18 pm high tide, a major period and a light onshore breeze. Also worth a try from 6:40 am to 7:50 am, with the 7:04 am low tide and sunrise, though with rising pressure. Also good from 6:40 pm to 7:40 pm, with the 7:43 pm low tide and moonrise.
Species with the most records nearby: winter flounder, Atlantic cod, longfin inshore squid and pollock. October is one of the months when these are seen most: winter flounder and longfin inshore squid. What you can catch
Beach day in Green Harbor
Is it a beach day?
Rip current risk today: moderate · tomorrow: low (NWS)
Dangerous rip currents are possible: swim only near a lifeguard and follow the flags. If one pulls you out, swim parallel to the shore.
- Sun and clouds
- Offshore breeze (6 mph)
- Low tide at 7:04 am: more sand
- Feels like 52 °F: chilly for the beach
- Calm for swimming: 1.4 ft waves; moderate rip current risk (NWS)
- Water at 56 °F (very cold)
Today, hour by hour
- Swimming Calm · 1.4 ft
1.4 ft waves: calm for swimming. Always follow the lifeguard's flags.
- Water 56 °F
Very cold: ease in and keep swims short.
- Sun & sunscreen UV 3 · SPF 15
Max UV 3 (low): SPF 15 sunscreen.
- Wind 6 mph
Offshore breeze (6 mph).
- Tide & sand 7:04 am
Low tide at 7:04 am and 7:43 pm: that's when there's the most sand. High tide at 1:06 am and 1:18 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 Green Harbor
Map: OpenFreeMap · © OpenMapTiles · © OpenStreetMap contributors
- Shipyard Lane Beach 3.7 mi · S
- Standish Shore 4.3 mi · S
- Captain's Flats 5.1 mi · S
- Saquish Beach 5.5 mi · S
- Partial wheelchair access
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 Green Harbor
Webcams provided by windy.com — add a webcam
Tides in Green Harbor
Today's high and low tides
- ▲ High tide 1:06 am 9.5 ft · coef. 84
- ▼ Low tide 7:04 am 0.2 ft
- ▲ High tide 1:18 pm 11.0 ft · coef. 84
- ▼ Low tide 7:43 pm -1.0 ft
↑ Rising The tide is rising. 6 h 1 min to high tide at 1:55 am.
Tide coefficient 84 for the 1:06 am high tide and 84 for the 1:18 pm high tide. Average coefficient. The water rises and falls 12.1 ft between the highest high and the lowest low: a large 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 June 17 (11.6 ft) and the lowest, on December 25 (-1.5 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 come from October 27 to 30 (coefficient 84, 12.1 ft range). The smallest, from October 18 to 20 (coefficient 47, 6.8 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 | 7:11 am · 5:42 pm | High tide 1:06 am · 9.5 ft | Low tide 7:04 am · 0.2 ft | High tide 1:18 pm · 11.0 ft | Low tide 7:43 pm · -1.0 ft | Coef. 84 | 91% | Major periods 1:17 am · 1:48 pm | High |
| Thu 29 | 7:12 am · 5:40 pm | High tide 1:55 am · 9.4 ft | Low tide 7:53 am · 0.3 ft | High tide 2:07 pm · 11.0 ft | Low tide 8:35 pm · -0.9 ft | Coef. 84 | 84% | Major periods 2:21 am · 2:53 pm | Medium |
| Fri 30 | 7:13 am · 5:39 pm | High tide 2:47 am · 9.3 ft | Low tide 8:45 am · 0.4 ft | High tide 3:02 pm · 10.9 ft | Low tide 9:30 pm · -0.7 ft | Coef. 82 | 74% | Major periods 3:25 am · 3:57 pm | Medium |
| Sat 31 | 7:14 am · 5:38 pm | High tide 3:44 am · 9.1 ft | Low tide 9:43 am · 0.6 ft | High tide 4:01 pm · 10.6 ft | Low tide 10:29 pm · -0.4 ft | Coef. 79 | 63% | Major periods 4:27 am · 4:57 pm | Medium |
| Sun 1 | 6:15 am · 4:36 pm | High tide 3:45 am · 9.0 ft | Low tide 9:45 am · 0.8 ft | High tide 4:05 pm · 10.2 ft | Low tide 10:31 pm · -0.1 ft | Coef. 75 | Last quarter | Major periods 4:25 am · 4:52 pm | Medium |
| Mon 2 | 6:17 am · 4:35 pm | High tide 4:50 am · 8.9 ft | Low tide 10:51 am · 0.8 ft | High tide 5:12 pm · 9.9 ft | Low tide 11:34 pm · 0.1 ft | Coef. 72 | 41% | Major periods 5:18 am · 5:43 pm | Medium |
| Tue 3 | 6:18 am · 4:34 pm | High tide 5:56 am · 9.1 ft | Low tide 11:59 am · 0.8 ft | High tide 6:20 pm · 9.7 ft | — | Coef. 72 | 30% | Major periods 6:07 am · 6:30 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 Brant Rock station (NOAA), 0.4 mi from Green Harbor. Times and heights are its predictions.
Station data attribution: Slackwater database (https://github.com/openwatersio/slackwater-database)
The sea at Green Harbor
Sea stateSea state: smooth
The waves you may find
- Most commonMost common0.6 ft
- Significant1.1 ft
- Highest expectedHighest2.3 ft
One wave in seven is higher than the significant height, and about 3 times a day one reaches 2.3 ft. Before heading out, expect waves of up to 2.3 ft.
Wind on the coast and offshore
Cross-offshore wind. The coast faces northeast and the wind comes off the land at an angle: calmer water near the shore, and bait and boats drift out to sea.
Wave height, next 7 daysWaves, next 7 days
Waves build over the next few days. The biggest waves arrive on Saturday 31: 3.0 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 warmer than normal for late October (+2.1 °F).
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 7:54 pm (local time).
Nearest buoy
This is a real measurement of the sea, not a forecast. Data from station 44090, courtesy of CDIP (Coastal Data Information Program, Scripps Institution of Oceanography), via the NOAA National Data Buoy Center.
Surf in Green Harbor today
Surf today
Poor- 0.9–1.4 ft surf at the shore, small: good for learning or a longboard
- 1.4 ft swell at 3 s from the northeast, short: weak, messy waves
- Almost no wind (4 mph): glassy water
- Rising tide (high tide at 1:18 pm)
Rip current risk today: moderate · tomorrow: low (NWS)
Dangerous rip currents are possible: swim only near a lifeguard and follow the flags. If one pulls you out, swim parallel to the shore.
Surf height from the NWS, today: 2.0 ft
- Light: First light 6:42 am · sunrise 7:11 am · sunset 5:42 pm · last light 6:10 pm
- Tide: high 1:06 am (9.5 ft), low 7:04 am (0.2 ft), high 1:18 pm (11.0 ft) and low 7:43 pm (-1.0 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 55.9 °F: a 5/4 fullsuit with booties (and a hood if it’s windy).
- Energy: 4 kJ · Low power
Today’s surf at a glance
The best window, 10:00 am to 2:00 pm, 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 Green Harbor today
Diving and snorkeling today
Likely visibility: good- Slack water around high tide (1:18 pm): little current from 1:00 pm to 1:40 pm
- 1.2 ft swell at 4 s from the northeast: barely any surge
- Almost no wind
- 0.2 mph current toward the southeast, weak (model)
- Sun high: more light underwater
- Slack water today: high tide 1:06 am (12:40–1:30 am), low tide 7:04 am (6:40–7:20 am), high tide 1:18 pm (1:00–1:40 pm) and low tide 7:43 pm (7:20–8:00 pm)
- Likely visibility: good. Swell (up to 2.6 ft at 4 s) over the last few days has stirred up the water. Based on the last 24 hours of data.
- Water at 55.9 °F: a 7 mm semi-dry suit, with hood, gloves and booties.
- Snorkeling: good, calm sea and light wind.
- Night dive: dark from 6:10 pm. Waning gibbous (91%), rising at 7:10 pm: a bright night.
Your diving day at a glance
The best window, 12:20 pm to 2:10 pm, combines slack water at high tide, little swell, light wind, weak current and the sun high. Also good from 6:40 am to 8:10 am, with slack water at low tide, little swell, light wind and weak 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
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.
Weather in Green Harbor
Now in Green Harbor
- Low / high
- 33 / 55 °F
- Rain
- 0.00 in · 1%
- Clouds
- 45%
- Humidity
- 64%
- Dew pointDew point
- 35 °F
- Visibility
- 17 mi
- UV indexUV
- 0 · low
- Air qualityAir
- Good · 50
- 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 (+0.00 inHg in 3 hours). Over the next 48 hours: −0.31 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 | Mainly clear | Clear | Clear | Mainly clear | Overcast | Overcast | Overcast | Mainly clear |
| Temperature | 37° | 34° | 33° | 42° | 54° | 53° | 50° | 45° |
| Wind (mph) | 3 W | 5 WSW | 6 WSW | 4 SW | 2 NE | 6 ENE | 3 E | 6 SW |
| Gusts | 6 | 8 | 9 | 5 | 4 | 9 | 8 | 15 |
| Waves | 1.6 ft | 1.4 ft | 1.4 ft | 1.4 ft | 1.4 ft | 1.3 ft | 1.2 ft | 1.1 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 45° 6 SW 1.1 ft
- 12:00 am 43° 6 SW 1.0 ft
- 3:00 am 43° 7 SW 0.9 ft
- 6:00 am 44° 7 SW 0.9 ft
- 9:00 am 51° 8 SW 0.9 ft
- 12:00 pm 62° 12 SW 1.1 ft
- 3:00 pm 66° 13 SW 1.3 ft
- 6:00 pm 60° 12 SSW 1.4 ft
Next 14 daysComing days
| Day | Sky | Low / high | Max wind | Max wave | High tides |
|---|---|---|---|---|---|
| Today · 28 | 33 / 55 °F | 6 mph WSW | 1.6 ft | 1:06 am · 1:18 pm | |
| Thu 29 | 43 / 66 °F | 13 mph SW | 1.5 ft | 1:55 am · 2:07 pm | |
| Fri 30 | 48 / 68 °F | 12 mph W | 2.8 ft | 2:47 am · 3:02 pm | |
| Sat 31 | 40 / 52 °F | 15 mph NNW | 3.0 ft | 3:44 am · 4:01 pm | |
| Sun 1 | 36 / 57 °F | 6 mph WSW | 1.5 ft | 3:45 am · 4:05 pm | |
| Mon 2 | 43 / 63 °F | 7 mph WSW | 0.7 ft | 4:50 am · 5:12 pm | |
| Tue 3 | 48 / 60 °F | 9 mph ENE | 0.8 ft | 5:56 am · 6:20 pm | |
| Wed 4 | 48 / 60 °F | 11 mph S | 2.3 ft | 7:00 am · 7:26 pm | |
| Thu 5 | 49 / 61 °F | 13 mph ESE | 1.5 ft | 7:58 am · 8:26 pm | |
| Fri 6 | 51 / 60 °F | 17 mph S | 2.5 ft | 8:50 am · 9:21 pm | |
| Sat 7 | 46 / 57 °F | 12 mph NW | 6.5 ft | 9:37 am · 10:10 pm | |
| Sun 8 | 39 / 54 °F | 12 mph WNW | 6.0 ft | 10:21 am · 10:55 pm | |
| Mon 9 | 35 / 55 °F | 6 mph WNW | 2.2 ft | 11:00 am · 11:35 pm | |
| Tue 10 | 40 / 53 °F | 8 mph NE | 2.5 ft | 11:38 am |
- Thu 29 Clear sky 43° / 66° 1.5 ft
- Fri 30 Overcast 48° / 68° 2.8 ft
- Sat 31 Mainly clear 40° / 52° 3.0 ft
- Sun 1 Mainly clear 36° / 57° 1.5 ft
- Mon 2 Partly cloudy 43° / 63° 0.7 ft
- Tue 3 Overcast 48° / 60° 0.8 ft
- Wed 4 Overcast 48° / 60° 2.3 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 They agree · high confidence for the next few days. 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, cooler than normal for late October (−3.2 °F; normal high: 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 7:54 pm (local time).
The sun in Green Harbor
Sunrise and sunset
- First light 6:09 am
- Full dark 6:43 pm
- Civil dawn 6:42 am
- Civil dusk 6:10 pm
- Solar noon 12:26 pm (35° high)
- Daylight 10 h 31 min (−3 min)
- Evening golden hour 5:02 pm
- Full dark 6:43 pm
Golden hour and the day-night map
Today the sun is 92,355,067 mi away and looks 32′ 11″ across.
The moon in Green Harbor
Moon phase and position
Today the moon is 226,429 mi away and looks 32′ 47″ across.
Solunar periods
Today's activity: high- 1:17–3:17 am Major · the moon passes overhead · high activity
- 1:48–3:48 pm Major · the moon passes underfoot · high activity
- 9:53–10:53 am Minor · moonset · medium activity
- 6:40–7:40 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 Green Harbor
Piers, ramps and tackle shops nearby
Map: OpenFreeMap · © OpenMapTiles · © OpenStreetMap contributors
- State Pier 8.2 mi
- NOAA Pier 9.1 mi
- Jetty 0.2 mi
- Jetty 5.6 mi
- Marshfield Boat Launch Facility 0.4 mi
- Boat ramp 2.9 mi
- Boat ramp 3.0 mi
- Marina 0.5 mi
- Roht Marina 7.5 mi
- Fish Green Harbor 0.5 mi
- Duxbury Bait & Tackle 3.0 mi
- Fuel dock 9.0 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
Gentle slopeThe bottom slopes gently: 16 ft deep 0.35 mi from shore and 33 ft at 0.7 mi.
From the shoreline (0.7 mi from Green Harbor) out to sea, heading northeast.
How far from shore
- 16 ft deep0.35 mi
- 33 ft deep0.7 mi
- 66 ft deep1.9 mi
- 164 ft deepnot within 3.1 mi
For fishing, swimming and diving
- Shore fishing. Shallow, gradual bottom (16 ft at 0.35 mi): cast far from the beach and fish the high tide, when there is more water close in.
- 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 near shore: you only reach 33 ft at 0.7 mi. For dives deeper than 33 ft, go by boat.
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
Plymouth Light 5.7 mi southeast
- Range
- 17 nautical miles (20 mi)
- Light height
- 102 ft above sea level
- Tower height
- 33 ft
- Built
- 1768
Data from Wikidata. For reference only: not for navigation. Wikipedia · Wikidata · Sources and licenses
Tides near Green HarborTides nearby
- Duxbury2.8 mi
- Marshfield3.0 mi
- South Duxbury4.1 mi
- Kingston6.9 mi
- North Plymouth7.6 mi
- Plymouth8.3 mi
- Scituate9.0 mi
- North Scituate12 mi
- Minot13 mi
- Cohasset14 mi
Green Harbor at a glance
- Town or city. Coordinates: 42.078° N, 70.649° W.
- It is 29 mi southeast of Boston, the main place in Massachusetts. The sun rises 2 min earlier and sets 1 min earlier than in Boston.
- The nearest tide station, Brant Rock, is 0.4 mi to the north.
- Its coast faces northeast.
- Beaches and harbors nearby: Taylor Marina (0.4 mi), Green Harbor Marina (0.5 mi), Sunrise Beach (0.9 mi), Shipyard Lane Beach (3.7 mi).
Questions about Green HarborQuestions
What time is high tide today in Green Harbor?
Today in Green Harbor there are high tides at 1:06 am (9.5 ft) and 1:18 pm (11.0 ft) and low tides at 7:04 am and 7:43 pm. Tide coefficient 84.
What time is sunset today in Green Harbor?
At 5:42 pm. There is light until the end of civil twilight, at 6:10 pm.
What time is sunrise tomorrow in Green Harbor?
At 7:12 am. First light comes at 6:10 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 1:17–3:17 am, Minor 9:53–10:53 am, Major 1:48–3:48 pm, Minor 6:40–7:40 pm. Today's activity is high.
What's the weather like today in Green Harbor?
Overcast, from 33 °F to 55 °F, with a light breeze from the south-southwest (5 mph) and a 1% chance of rain.
How is the sea today in Green Harbor?
Smooth (Douglas 2): 1.1 ft waves with a period of 4.9 s from the northeast. The water is 56.1 °F.
When is the best time to visit Green Harbor?
The best time to visit Green Harbor is from June to September: highs of 73 °F to 82 °F, about 9 rainy days a month and 7 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 Brant Rock (public domain), via Slackwater database. Sun and moon: our own calculation with astronomy-engine. Places: GeoNames (CC BY 4.0). Coastline: © OpenStreetMap contributors (ODbL).