Barnum Island tides today
- Tide now 4.8 ft ↑ rising · high 10:56 am (5.0 ft)
- Best time to fish 4:20–6:20 pm good day · 7/10
- Beach day 3:00–5:00 pm Poor beach day · 3/10
- Waves · water 1.4 ft · 61 °F smooth · 6.6 s from the southeast
- Wind · air 3 mph · 58 °F from the WNW, gusts 11 · clear sky
- Surf today 1.0–1.6 ft Poor day · 1/10 · 7:00–11:00 am
- Sun 7:21 am–5:55 pm 10 h 33 min of daylight
- Moon 84% · 8:31 pm waning gibbous · rises at 8:31 pm
- Small Craft Advisory: winds or seas hazardous to small boats. From 2:00 pm tomorrow to Sat 31, 3:00 am. NWS Upton NY
Today in Barnum Island there are high tides at 10:56 am (5.0 ft) and 11:30 pm (3.9 ft) and low tides at 4:28 am and 5:19 pm. Tide coefficient 82. Right now the tide is rising toward the high tide at 10:56 am. The sun rises at 7:21 am and sets at 5:55 pm: 10 h 33 min of daylight. The moon is 84% illuminated (waning gibbous) and rises at 8:31 pm. Major solunar periods run from 2:33 am to 4:33 am and from 3:05 pm to 5:05 pm. The next spring tides arrive from November 9 to 11. The sea is smooth, with 1.4 ft waves. There's a light air from the west-northwest (3 mph). Clear sky, 58 °F.
Fishing in Barnum Island today
Best time to fish
Solunar activity today: medium- Low tide at 5:19 pm
- Major period 3:05–5:05 pm
- Sunset at 5:55 pm, golden hour from 5:16 pm
- Falling pressure (−0.26 inHg in 24 h), light onshore wind (10 mph) and calm sea (1.6 ft waves)
- Waning gibbous: a bit more activity than at the quarters
- Highest tide coefficient today: 82 (average tides)
Your day at a glance
The best window, 4:20 pm to 6:20 pm, combines the 5:19 pm low tide, a major period, sunset, falling pressure and a light onshore breeze. Also good from 11:10 am to 12:00 pm, with the 10:56 am high tide, moonset, falling pressure and a light onshore breeze. Also worth a try from 3:30 am to 4:30 am, with the 4:28 am low tide, a major period and falling pressure, though with moderate wind.
Species with the most records nearby: winter flounder, summer flounder, longfin inshore squid and scup. October is one of the months when these are seen most: summer flounder and longfin inshore squid. What you can catch
Beach day in Barnum Island
Is it a beach day?
- Sunny
- Onshore breeze (9 mph)
- Calm for swimming: 1.5 ft waves
- Low tide at 5:19 pm: more sand
- Feels like 62 °F: chilly for the beach
- Water at 61 °F (cold)
Today, hour by hour
- Swimming Calm · 1.5 ft
1.5 ft waves: calm for swimming. Low rip current risk. Always follow the lifeguard's flags.
- Water 61 °F
Cold: ease in slowly.
- Sun & sunscreen UV 3 · SPF 30
Max UV 3 (moderate): SPF 30 sunscreen, reapplied every 2 hours.
- Wind 9 mph
Onshore breeze (9 mph).
- Tide & sand 5:19 pm
Low tide at 4:28 am and 5:19 pm: that's when there's the most sand. High tide at 10:56 am and 11:30 pm.
The best window, 3:00 pm to 5:00 pm, brings sunshine, little wind, a calm sea and low tide at 5:19 pm, though with cool air.
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 Barnum Island
Map: OpenFreeMap · © OpenMapTiles · © OpenStreetMap contributors
- Harbor Isle Beach 1.0 mi · W
- Long Beach 1.9 mi · SW
- Restrooms
- Showers
- Parking
- Lido Beach 1.9 mi · SE
- Parking
- Hicks Beach 3.1 mi · W
- East Atlantic Beach 3.4 mi · SW
- Atlantic Beach 4.6 mi · W
- Parking
- Sun and Surf Beach Club 5.7 mi · W
Water quality: check the official beach advisories for New York (New York State Department of 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 Barnum Island
Webcams provided by windy.com — add a webcam
Tides in Barnum Island
Today's high and low tides
- ▼ Low tide 4:28 am 0.1 ft
- ▲ Next high tide 10:56 am 5.0 ft · coef. 82
- ▼ Low tide 5:19 pm 0.0 ft
- ▲ High tide 11:30 pm 3.9 ft · coef. 79
↑ Rising The tide is rising. 53 min to high tide at 10:56 am.
Tide coefficient 82 for the 10:56 am high tide and 79 for the 11:30 pm high tide. Average coefficient. The water rises and falls 5.0 ft between the highest high and the lowest low: an average 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 14 (5.4 ft) and the lowest, on February 2 (-0.9 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 28 (coefficient 90, 5.3 ft range). The smallest, from October 18 to 19 (coefficient 41, 2.6 ft).
Tide and solunar table · this week
| Day | Sun | Tide 1 | Tide 2 | Tide 3 | Tide 4 | Coef. | Moon | Major periods | Activity |
|---|---|---|---|---|---|---|---|---|---|
| Today, Thu 29 | 7:21 am · 5:55 pm | Low tide 4:28 am · 0.1 ft | High tide 10:56 am · 5.0 ft | Low tide 5:19 pm · 0.0 ft | High tide 11:30 pm · 3.9 ft | Coef. 82 | 84% | Major periods 2:33 am · 3:05 pm | Medium |
| Fri 30 | 7:22 am · 5:53 pm | Low tide 5:19 am · 0.2 ft | High tide 11:56 am · 4.8 ft | Low tide 6:14 pm · 0.2 ft | — | Coef. 76 | 74% | Major periods 3:38 am · 4:09 pm | Medium |
| Sat 31 | 7:24 am · 5:52 pm | High tide 12:35 am · 3.8 ft | Low tide 6:17 am · 0.5 ft | High tide 1:01 pm · 4.6 ft | Low tide 7:16 pm · 0.3 ft | Coef. 72 | 63% | Major periods 4:40 am · 5:09 pm | Medium |
| Sun 1 | 6:25 am · 4:51 pm | High tide 1:41 am · 3.8 ft | Low tide 6:27 am · 0.7 ft | High tide 1:05 pm · 4.4 ft | Low tide 7:24 pm · 0.4 ft | Coef. 67 | Last quarter | Major periods 4:38 am · 5:05 pm | Medium |
| Mon 2 | 6:26 am · 4:50 pm | High tide 1:44 am · 3.9 ft | Low tide 7:44 am · 0.7 ft | High tide 2:05 pm · 4.3 ft | Low tide 8:29 pm · 0.3 ft | Coef. 64 | 41% | Major periods 5:31 am · 5:56 pm | Medium |
| Tue 3 | 6:27 am · 4:49 pm | High tide 2:44 am · 4.0 ft | Low tide 8:54 am · 0.7 ft | High tide 3:05 pm · 4.2 ft | Low tide 9:26 pm · 0.2 ft | Coef. 66 | 30% | Major periods 6:19 am · 6:43 pm | Medium |
| Wed 4 | 6:28 am · 4:47 pm | High tide 3:44 am · 4.2 ft | Low tide 9:55 am · 0.5 ft | High tide 4:05 pm · 4.1 ft | Low tide 10:16 pm · 0.1 ft | Coef. 70 | 21% | Major periods 7:05 am · 7:27 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 Long Beach station (Inside, NOAA), 0.4 mi from Barnum Island. Times and heights are its predictions. It is a NOAA subordinate station: its times and heights come from the Sandy Hook reference station with the official corrections.
Station data attribution: Slackwater database (https://github.com/openwatersio/slackwater-database)
The sea at Barnum Island
Sea stateSea state: smooth
The waves you may find
- Most commonMost common0.7 ft
- Significant1.4 ft
- Highest expectedHighest2.8 ft
One wave in seven is higher than the significant height, and about 3 times a day one reaches 2.8 ft. Before heading out, expect waves of up to 2.8 ft.
Wind on the coast and offshore
Cross-offshore wind. The coast faces south 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 Wednesday 4: 3.4 ft with a period of 5 s, from the east-southeast (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 (+1.4 °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 10:02 am (local time).
Nearest buoy
This is a real measurement of the sea, not a forecast. Data from station 44025, NOAA National Data Buoy Center (public domain).
Surf in Barnum Island today
Surf today
Poor- 1.0–1.6 ft surf at the shore, small: good for learning or a longboard
- 1.4 ft swell at 6 s from the southeast, short: weak, messy waves
- Almost no wind (3 mph): glassy water
- Rising tide (high tide at 10:56 am)
- Light: First light 6:53 am · sunrise 7:21 am · sunset 5:55 pm · last light 6:23 pm
- Tide: low 4:28 am (0.1 ft), high 10:56 am (5.0 ft), low 5:19 pm (-0.0 ft) and high 11:30 pm (3.9 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 60.6 °F: a 4/3 fullsuit.
- Energy: 10 kJ · Low power
Today’s surf at a glance
The best window, 7:00 am to 11:00 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.
Follow the flags and the lifeguards, and don’t paddle out if the surf is above your level: this score is a guide, not a substitute for what you see when you get there.
Diving in Barnum Island today
Diving and snorkeling today
Likely visibility: good- Slack water around high tide (10:56 am): little current from 10:20 am to 11:30 am
- 1.3 ft swell at 6 s from the southeast: barely any surge
- Light cross-shore wind (6 mph)
- 0.3 mph current toward the east, weak (model)
- Sun high: more light underwater
- Slack water today: low tide 4:28 am (4:00–5:00 am), high tide 10:56 am (10:20–11:30 am), low tide 5:19 pm (4:50–5:50 pm) and high tide 11:30 pm (10:40 pm–12:00 am)
- Likely visibility: good. The sea has been calm and there's been little rain. Based on the last 24 hours of data.
- Water at 60.6 °F: a 7 mm wetsuit, with hood and booties.
- Snorkeling: good, calm sea and light wind.
- Night dive: dark from 6:23 pm. Waning gibbous (84%), rising at 8:31 pm: a bright night.
Your diving day at a glance
The best window, 9:40 am to 12:10 pm, combines slack water at high tide, little swell, light wind, weak current and the sun high. Also good from 4:30 pm to 5:50 pm, 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
- Wreck 0.1 mi
- Wreck 0.1 mi
- Wreck 0.2 mi
- Wreck 0.7 mi
- Wreck 0.9 mi
- Wreck 1.0 mi
- McAllister Grounds 4.7 mi
- Atlantic Beach Reef 6.5 mi
- Jamaica Bay Wildlife Refuge 10 mi
- Andi International 3.9 mi
- East Coast Wreck Diving 4.2 mi
- Classic Seal Coating 8.3 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 Barnum Island
Now in Barnum Island
- Low / high
- 47 / 63 °F
- Rain
- 0.00 in · 1%
- Clouds
- 0%
- Humidity
- 85%
- Dew pointDew point
- 53 °F
- Visibility
- 10 mi
- UV indexUV
- 2 · low
- Air qualityAir
- Moderate · 61
- 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: +0.15 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 | Light drizzle | Clear | Clear | Clear sky | Clear sky | Clear sky | Clear | Clear |
| Temperature | 54° | 50° | 50° | 50° | 61° | 63° | 60° | 60° |
| Wind (mph) | 5 S | 3 SE | 3 NW | 1 NNW | 7 WSW | 7 SSW | 11 SSW | 11 SW |
| Gusts | 9 | 11 | 5 | 5 | 13 | 13 | 18 | 20 |
| Waves | 1.6 ft | 1.6 ft | 1.4 ft | 1.4 ft | 1.4 ft | 1.4 ft | 1.7 ft | 2.0 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 |
- 12:00 pm 61° 7 WSW 1.4 ft
- 3:00 pm 63° 7 SSW 1.4 ft
- 6:00 pm 60° 11 SSW 1.7 ft
- 9:00 pm 60° 11 SW 2.0 ft
- 12:00 am 58° 11 WSW 2.1 ft
- 3:00 am 58° 13 WSW 2.0 ft
- 6:00 am 57° 8 WSW 2.0 ft
- 9:00 am 61° 8 W 1.8 ft
Next 14 daysComing days
| Day | Sky | Low / high | Max wind | Max wave | High tides |
|---|---|---|---|---|---|
| Today · 29 | 47 / 63 °F | 13 mph SW | 2.1 ft | 10:56 am · 11:30 pm | |
| Fri 30 | 53 / 69 °F | 13 mph WNW | 2.1 ft | 11:56 am | |
| Sat 31 | 47 / 60 °F | 9 mph NNW | 1.5 ft | 12:35 am · 1:01 pm | |
| Sun 1 | 47 / 61 °F | 6 mph W | 1.0 ft | 1:41 am · 1:05 pm | |
| Mon 2 | 50 / 65 °F | 8 mph WSW | 1.5 ft | 1:44 am · 2:05 pm | |
| Tue 3 | 54 / 66 °F | 9 mph E | 1.5 ft | 2:44 am · 3:05 pm | |
| Wed 4 | 56 / 67 °F | 11 mph E | 3.4 ft | 3:44 am · 4:05 pm | |
| Thu 5 | 58 / 67 °F | 12 mph ESE | 5.7 ft | 4:41 am · 5:01 pm | |
| Fri 6 | 54 / 66 °F | 11 mph S | 9.8 ft | 5:32 am · 5:51 pm | |
| Sat 7 | 51 / 61 °F | 13 mph WSW | 9.1 ft | 6:16 am · 6:36 pm | |
| Sun 8 | 48 / 60 °F | 10 mph NW | 7.2 ft | 6:55 am · 7:18 pm | |
| Mon 9 | 47 / 58 °F | 8 mph W | 3.3 ft | 7:33 am · 7:58 pm | |
| Tue 10 | 47 / 62 °F | 4 mph S | 3.0 ft | 8:09 am · 8:39 pm | |
| Wed 11 | 50 / 59 °F | 7 mph NNW | 2.8 ft | 8:46 am · 9:21 pm |
- Fri 30 Clear sky 53° / 69° 2.1 ft
- Sat 31 Mainly clear 47° / 60° 1.5 ft
- Sun 1 Overcast 47° / 61° 1.0 ft
- Mon 2 Partly cloudy 50° / 65° 1.5 ft
- Tue 3 Overcast 54° / 66° 1.5 ft
- Wed 4 Overcast 56° / 67° 3.4 ft
- Thu 5 Drizzle 58° / 67° 5.7 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 They agree · high confidence for the next few days. See the models →
- Outlook Next few weeks, compared with normal: warmer, a bit wetter and a slightly warmer sea. See the outlook →
- Normal Today, warmer than normal for late October (+3.1 °F; normal high: 60 °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 10:02 am (local time).
The sun in Barnum Island
Sunrise and sunset
- First light 6:21 am
- Full dark 6:55 pm
- Civil dawn 6:53 am
- Civil dusk 6:23 pm
- Solar noon 12:38 pm (36° high)
- Daylight 10 h 33 min (−2 min)
- Evening golden hour 5:16 pm
- Full dark 6:55 pm
Golden hour and the day-night map
Today the sun is 92,330,612 mi away and looks 32′ 11″ across.
The moon in Barnum Island
Moon phase and position
Today the moon is 226,746 mi away and looks 32′ 44″ across.
Solunar periods
Today's activity: medium- 2:33–4:33 am Major · the moon passes overhead · high activity
- 3:05–5:05 pm Major · the moon passes underfoot · high activity
- 11:10 am–12:10 pm Minor · moonset · medium activity
- 8:01–9:01 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 3 days
- New moon Mon, Nov 9 · 2:03 amNov 9 in 11 days
- First quarter Tue, Nov 17 · 6:48 amNov 17 in 19 days
- Full moon Tue, Nov 24 · 9:54 amNov 24 in 26 days
Next perigee (the moon at its closest to Earth): November 25, 223,281 mi away.
Where to fish in Barnum Island
Piers, ramps and tackle shops nearby
Map: OpenFreeMap · © OpenMapTiles · © OpenStreetMap contributors
- Jetty 4.1 mi
- Coast Guard Station Jones Beach Breakwater 4.7 mi
- Jones Beach Field 10 Fishing Pier 6.8 mi
- Wantagh Park Fishing Pier 7.3 mi
- Boat ramp 0.6 mi
- Boat ramp 0.7 mi
- Long Beach Recreation Center Boat Launch 1.4 mi
- Woodmere Bay Yacht Club 2.1 mi
- Hewlett Point Yacht Club 2.4 mi
- Ralph's Tackle 0.3 mi
- West Marine 0.6 mi
- Valvitect 3.5 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
Deepens quicklyThe bottom deepens quickly: 33 ft of water 1,250 ft from shore.
From the shoreline (0.3 mi from Barnum Island) out to sea, heading south.
How far from shore
- 16 ft deep240 ft
- 33 ft deep1,250 ft
- 66 ft deepnot within 0.35 mi
- 164 ft deepnot within 0.35 mi
For fishing, swimming and diving
- Shore fishing. Deep water close in: about 19 ft just 330 ft out. Good for casting from rocks, jetties or the beach itself; current and surf hit harder here.
- Swimming. The bottom drops quickly near the shore and you are soon out of your depth. Keep an eye on kids and weak swimmers.
- Diving. 33 ft deep 1,250 ft from shore; 66 ft is far out (beyond 0.35 mi): for deeper dives, go by boat.
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) 0.35 mi out. Right by the shore the bottom may drop even faster than shown.
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.
Tides near Barnum IslandTides nearby
- Island Park0.6 mi
- Harbor Isle1.1 mi
- Long Beach1.3 mi
- Lido Beach1.5 mi
- Oceanside2.4 mi
- Malverne Park Oaks2.4 mi
- Bay Park2.4 mi
- East Rockaway2.9 mi
- Hewlett Neck3.1 mi
- Hewlett Bay Park3.3 mi
Barnum Island at a glance
- Town or city of about 2,414 people. Coordinates: 40.605° N, 73.644° W.
- It is 20 mi east of New York, the main place in New York. The sun rises 2 min earlier and sets 1 min earlier than in New York.
- The nearest tide station, Long Beach, is 0.4 mi to the southwest.
- Its coast faces south.
- Beaches and harbors nearby: Hicks Beach (3.2 mi), East Atlantic Beach (Nassau County) (3.4 mi), Freeport Marina (3.9 mi), Short Beach (4.9 mi).
Questions about Barnum IslandQuestions
What time is high tide today in Barnum Island?
Today in Barnum Island there are high tides at 10:56 am (5.0 ft) and 11:30 pm (3.9 ft) and low tides at 4:28 am and 5:19 pm. Tide coefficient 82.
What time is sunset today in Barnum Island?
At 5:55 pm. There is light until the end of civil twilight, at 6:23 pm.
What time is sunrise tomorrow in Barnum Island?
At 7:22 am. First light comes at 6:22 am.
What phase is the moon today?
Waning gibbous, 84% illuminated. New moon on Mon, Nov 9 · 2:03 am.
When are the next spring tides?
From November 9 to 11.
What are today's solunar periods?
Major 2:33–4:33 am, Minor 11:10 am–12:10 pm, Major 3:05–5:05 pm, Minor 8:01–9:01 pm. Today's activity is medium.
What's the weather like today in Barnum Island?
Light drizzle, from 47 °F to 63 °F, with a light air from the west-northwest (3 mph) and a 1% chance of rain.
How is the sea today in Barnum Island?
Smooth (Douglas 2): 1.4 ft waves with a period of 6.6 s from the southeast. The water is 60.8 °F.
When is the best time to visit Barnum Island?
The best time to visit Barnum Island is from June to September: highs of 76 °F to 84 °F, about 10 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 Long Beach (Inside) (public domain), via Slackwater database. Sun and moon: our own calculation with astronomy-engine. Places: GeoNames (CC BY 4.0). Coastline: © OpenStreetMap contributors (ODbL).