Naksanhaesuyokjang today
- Beach tomorrow 12:00–4:00 pm Poor beach day · 4/10
- Tide now 0.1 ft ↑ rising · high 6:33 pm (0.8 ft)
- Best time to fish 5:30–7:30 pm good day · 7/10
- Waves · water 1.0 ft · 65 °F smooth · 5.1 s from the northeast
- Wind · air 4 mph · 57 °F from the SW, gusts 14 · partly cloudy
- Sun 6:48 am–5:30 pm 10 h 42 min of daylight
- Moon 88% · 7:35 pm waning gibbous · rises at 7:35 pm
- Diving tomorrow 11:30 am–1:20 pm great day · 10/10
Today in Naksanhaesuyokjang there are high tides at 3:54 am (1.1 ft) and 6:33 pm (0.8 ft) and low tides at 11:25 am and 10:26 pm. Tide coefficient 92. Right now the tide is rising toward the high tide at 6:33 pm. The sun rises at 6:48 am and sets at 5:30 pm: 10 h 42 min of daylight. The moon is 88% illuminated (waning gibbous) and rises at 7:35 pm. Major solunar periods run from 1:28 am to 3:28 am and from 2:00 pm to 4:00 pm. The next spring tides arrive from October 27 to 29. The sea is smooth, with 1.0 ft waves. There's a light breeze from the southwest (4 mph). Partly cloudy, 57 °F.
Beach day in Naksanhaesuyokjang
Is it a beach day?
- Sun and clouds
- Offshore breeze (6 mph)
- Calm for swimming: 1.4 ft waves
- Water at 65 °F (cool)
- Low tide at 11:25 am: more sand
- Feels like 54 °F: chilly for the beach
Today, hour by hour
- Swimming Calm · 1.4 ft
1.4 ft waves: calm for swimming. Low rip current risk. Always follow the lifeguard's flags.
- Water 65 °F
Cool: refreshing on a hot day.
- Sun & sunscreen UV 2 · SPF 15
Max UV 2 (low): SPF 15 sunscreen.
- Wind 6 mph
Offshore breeze (6 mph).
- Tide & sand 10:26 pm
Low tide at 11:25 am and 10:26 pm: that's when there's the most sand. High tide at 3:54 am and 6:33 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
About NaksanhaesuyokjangThe beach
3.2 mi from Susal-li. Tides, weather and sun in Susal-li →
- Restrooms
- Parking
Amenities from OpenStreetMap: some may be missing or out of date. See on OpenStreetMap · Fix on OpenStreetMap
Beaches near Naksanhaesuyokjang
Map: OpenFreeMap · © OpenMapTiles · © OpenStreetMap contributors
- Seorak Beach 1.2 mi · NW
- Restrooms
- Parking
- 정암해수욕장 1.9 mi · NW
- Restrooms
- Parking
- 물치해수욕장 3.0 mi · NW
- Dongho Beach 4.8 mi · SE
- Oeongchi Beach 4.9 mi · N
- Parking
- Sokcho Beach 5.3 mi · N
- Lifeguard
- Restrooms
- Showers
- Parking
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 Naksanhaesuyokjang
Webcams provided by windy.com — add a webcam
Fishing in Naksanhaesuyokjang today
Best time to fish
Solunar activity today: medium- High tide at 3:54 am, coefficient 92
- Major period 1:28–3:28 am
- Steady pressure (30.21 inHg), light offshore wind (7 mph) and some swell (1.9 ft waves) to stir the water
- Waning gibbous: a bit more activity than at the quarters
- Highest tide coefficient today: 92 (spring tides)
Your day at a glance
The best window, 2:50 am to 3:30 am, combines the 3:54 am high tide, a major period and some swell. Also good from 5:30 pm to 7:30 pm, with the 6:33 pm high tide, moonrise, sunset and falling pressure. Also good from 10:30 am to 12:30 pm, with the 11:25 am low tide, moonset and falling pressure.
Tides in Naksanhaesuyokjang
Today's high and low tides
- ▲ High tide 3:54 am 1.1 ft · coef. 92
- ▼ Low tide 11:25 am 0.0 ft
- ▲ Next high tide 6:33 pm 0.8 ft · coef. 85
- ▼ Low tide 10:26 pm 0.6 ft
↑ Rising The tide is rising. 5 h 50 min to high tide at 6:33 pm.
Tide coefficient 92 for the 3:54 am high tide and 85 for the 6:33 pm high tide. Spring tides. The water rises and falls 1.1 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 December 26 (1.2 ft) and the lowest, on December 25 (-0.1 ft).
Mixed: two high and two low tides a day, but of quite different heights.
Heights above chart datum (CD), the zero of that port's 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. chart datum (CD)
Tide coefficient and range in October
The biggest tides of the month came from October 26 to 28 (coefficient 101, 1.1 ft range). The smallest, on October 19 (coefficient 27, 0.6 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 | 6:48 am · 5:30 pm | High tide 3:54 am · 1.1 ft | Low tide 11:25 am · 0.0 ft | High tide 6:33 pm · 0.8 ft | Low tide 10:26 pm · 0.6 ft | Coef. 92 | 88% | Major periods 1:28 am · 2:00 pm | Medium |
| Fri 30 | 6:49 am · 5:29 pm | High tide 4:31 am · 1.1 ft | Low tide 12:22 pm · 0.0 ft | High tide 7:54 pm · 0.7 ft | Low tide 10:52 pm · 0.7 ft | Coef. 80 | 80% | Major periods 2:32 am · 3:05 pm | High |
| Sat 31 | 6:50 am · 5:28 pm | High tide 5:15 am · 1.1 ft | Low tide 1:25 pm · 0.1 ft | — | — | Coef. 67 | 69% | Major periods 3:36 am · 4:07 pm | Medium |
| Sun 1 | 6:51 am · 5:27 pm | High tide 6:09 am · 1.0 ft | Low tide 2:37 pm · 0.1 ft | — | — | Coef. 54 | 58% | Major periods 4:37 am · 5:05 pm | Medium |
| Mon 2 | 6:52 am · 5:26 pm | High tide 7:22 am · 0.9 ft | Low tide 3:52 pm · 0.2 ft | High tide 11:59 pm · 0.7 ft | — | Coef. 48 | Last quarter | Major periods 5:32 am · 5:58 pm | Medium |
| Tue 3 | 6:53 am · 5:25 pm | Low tide 3:26 am · 0.7 ft | High tide 9:03 am · 0.9 ft | Low tide 5:00 pm · 0.2 ft | — | Coef. 50 | 36% | Major periods 6:23 am · 6:47 pm | Medium |
| Wed 4 | 6:54 am · 5:24 pm | High tide 12:20 am · 0.8 ft | Low tide 5:16 am · 0.6 ft | High tide 10:48 am · 0.8 ft | Low tide 5:55 pm · 0.3 ft | Coef. 58 | 26% | Major periods 7:11 am · 7:33 pm | Medium |
▲ high tide · ▼ low tide · heights above chart datum (CD). Major periods: start time; they last 2 hours. Activity: based on the moon phase and the solunar periods.
Where this tide comes from
Naksanhaesuyokjang has no station of its own, so we use the tide at Sokcho (KHOA), 6.7 mi away. On the open coast the difference is usually a few minutes and inches; inside estuaries, rivers and enclosed bays it can be much larger.
Station data attribution: Korea Hydrographic and Oceanographic Agency (해양수산부 국립해양조사원), harmonic constants of the TideBED reference ports (예측조위(타이드베드) 기준항 조화상수, 2025-08-12), station Sokcho (속초, DT_0012), https://www.data.go.kr/data/15145395/fileData.do. Free, no restrictions on use (이용허락범위 제한 없음). Modified by TidePlanet: M2, S2, K1 and O1 from KHOA, the other constituents of those bands inferred from them.
The sea at Naksanhaesuyokjang
Sea stateSea state: smooth
The waves you may find
- Most commonMost common0.5 ft
- Significant1.0 ft
- Highest expectedHighest2.1 ft
One wave in seven is higher than the significant height, and about 3 times a day one reaches 2.1 ft. Before heading out, expect waves of up to 2.1 ft.
Wind on the coast and offshore
Offshore wind. The coast faces northeast and the wind blows from land out to sea: calm shore and clean waves, but watch the drift out to sea.
Wave height, next 7 daysWaves, next 7 days
Waves stay much the same all week. The biggest waves arrive on Sunday 1: 2.9 ft with a period of 7 s, from the north-northeast (slight).
Water temperature
Water temperature →The satellite measured 2.9 °F more 2 days ago than the model gives now: the water is probably warmer than the forecast says.
Water temperature changes how fish behave: in very cold or very warm water they feed less. The water cools over the next few days: about 62.5 °F by Wednesday 4.
Water warmer than normal for late October (+1.6 °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 12:43 pm (local time).
Nearest buoy
This is a real measurement of the sea, not a forecast. Data from Korea Meteorological Administration, through the WMO Global Telecommunication System (GTS), via NOAA OSMC (public domain, CC0).
Surf in Naksanhaesuyokjang today
Surf today
Flat- Barely any waves (1.0 ft sets): flat
- Almost no wind (4 mph): glassy water
- Rising tide (high tide at 6:33 pm)
It’s flat today: almost no waves reach this coast.
- Light: First light 6:21 am · sunrise 6:48 am · sunset 5:30 pm · last light 5:57 pm
- Tide: high 3:54 am (1.1 ft), low 11:25 am (-0.0 ft), high 6:33 pm (0.8 ft) and low 10:26 pm (0.6 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 64.6 °F: a 3/2 fullsuit.
- Energy: 2 kJ · Low power
Today’s surf at a glance
The best window, 3:00 pm to 5:57 pm, has glassy water, though with barely any waves. 6:21 am to 10:00 am can also work, with light offshore wind, 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 Naksanhaesuyokjang today
Diving and snorkeling today
Likely visibility: good- Slack water around low tide (11:25 am): little current from 11:10 am to 11:40 am
- 1.0 ft swell at 5 s from the northeast: barely any surge
- Light offshore wind (6 mph)
- 0.2 mph current toward the north-northwest, weak (model)
- Sun high: more light underwater
- Slack water today: high tide 3:54 am (3:30–4:10 am), low tide 11:25 am (11:10–11:40 am), high tide 6:33 pm (6:00–7:20 pm) and low tide 10:26 pm (9:40–11:00 pm)
- Likely visibility: good. Swell (up to 3.1 ft at 6 s) over the last few days has stirred up the water. Based on the last 24 hours of data.
- Water at 64.6 °F: a 5 mm wetsuit.
- Snorkeling: good, calm sea and light wind.
- Night dive: dark from 5:57 pm. Waning gibbous (88%), rising at 7:35 pm: a bright night.
Your diving day at a glance
The best window, 10:40 am to 12:10 pm, combines slack water at low tide, little swell, light wind, weak current and the sun high.
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
- Bianca Venture 3.6 mi
- 오산다이브리조트 2.4 mi
- 딥브레스양양 3.4 mi
- PAX Scuba House 5.3 mi
- 다이브속초 5.6 mi
- 더스쿠바 6.5 mi
- 속초스쿠버센터 7.5 mi
- 에브리데이 다이브 8.0 mi
- 38스쿠버다이빙센터 8.8 mi
- 빅웨이브 9.0 mi
- 버블탱크 9.1 mi
- 봉포항 다이빙 리조트 10 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). Wrecks: EMODnet Human Activities (AND-International), from UK Hydrographic Office data, CC BY 4.0. Contains public sector information licensed under the Open Government Licence v3.0.
Weather in Naksanhaesuyokjang
Now in Naksanhaesuyokjang
- Low / high
- 42 / 60 °F
- Rain
- 0.00 in · 0%
- Clouds
- 71%
- Humidity
- 33%
- Dew pointDew point
- 28 °F
- Visibility
- 15 mi
- UV indexUV
- 1 · low
- Air qualityAir
- Fair · 26
- Saharan dust
- No
Pressure and fishing
- ↗ RisingRising Anglers say fish bite less for a while
- → SteadySteady Anglers expect normal activity
- ↘ FallingFalling · now Anglers say fish feed more before the change
Falling now (−0.06 inHg in 3 hours). It barely changes over the next 48 hours. Falling pressure: anglers say fish feed more before the change. 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 | Partly cloudy | Overcast | Overcast | Overcast | Clear sky | Partly cloudy | Mainly clear |
| Temperature | 44° | 42° | 44° | 50° | 56° | 60° | 56° | 53° |
| Wind (mph) | 7 WSW | 7 WSW | 5 SW | 6 SW | 6 SW | 6 SE | 5 WSW | 3 SSE |
| Gusts | 13 | 15 | 13 | 12 | 14 | 11 | 9 | 6 |
| Waves | 2.2 ft | 1.9 ft | 1.6 ft | 1.3 ft | 1.0 ft | 0.9 ft | 0.9 ft | 0.7 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 56° 6 SW 1.0 ft
- 3:00 pm 60° 6 SE 0.9 ft
- 6:00 pm 56° 5 WSW 0.9 ft
- 9:00 pm 53° 3 SSE 0.7 ft
- 12:00 am 53° 3 S 0.7 ft
- 3:00 am 53° 4 SW 0.7 ft
- 6:00 am 52° 3 SSW 0.5 ft
- 9:00 am 58° 3 WSW 0.5 ft
Next 14 daysComing days
| Day | Sky | Low / high | Max wind | Max wave | High tides |
|---|---|---|---|---|---|
| Today · 29 | 42 / 60 °F | 8 mph SW | 2.2 ft | 3:54 am · 6:33 pm | |
| Fri 30 | 52 / 66 °F | 11 mph WSW | 1.0 ft | 4:31 am · 7:54 pm | |
| Sat 31 | 47 / 60 °F | 11 mph W | 2.8 ft | 5:15 am | |
| Sun 1 | 47 / 60 °F | 7 mph SW | 2.9 ft | 6:09 am | |
| Mon 2 | 48 / 64 °F | 16 mph W | 2.2 ft | 7:22 am · 11:59 pm | |
| Tue 3 | 42 / 61 °F | 13 mph WSW | 2.2 ft | 9:03 am | |
| Wed 4 | 44 / 58 °F | 8 mph WSW | 2.3 ft | 12:20 am · 10:48 am | |
| Thu 5 | 49 / 67 °F | 11 mph WSW | 2.2 ft | 12:40 am · 12:14 pm | |
| Fri 6 | 41 / 52 °F | 15 mph WNW | 3.8 ft | 1:00 am · 1:23 pm | |
| Sat 7 | 37 / 52 °F | 11 mph WSW | 3.7 ft | 1:22 am · 2:20 pm | |
| Sun 8 | 35 / 52 °F | 14 mph WNW | 8.2 ft | 1:44 am · 3:11 pm | |
| Mon 9 | 32 / 50 °F | 15 mph W | 7.2 ft | 2:08 am · 3:58 pm | |
| Tue 10 | 44 / 56 °F | 13 mph W | 3.3 ft | 2:33 am · 4:42 pm | |
| Wed 11 | 47 / 61 °F | 14 mph WSW | 2.6 ft | 3:00 am · 5:27 pm |
- Fri 30 Overcast 52° / 66° 1.0 ft
- Sat 31 Overcast 47° / 60° 2.8 ft
- Sun 1 Overcast 47° / 60° 2.9 ft
- Mon 2 Overcast 48° / 64° 2.2 ft
- Tue 3 Clear sky 42° / 61° 2.2 ft
- Wed 4 Overcast 44° / 58° 2.3 ft
- Thu 5 Overcast 49° / 67° 2.2 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 today. See the models →
- Outlook The next few weeks look normal for the time of year. See the outlook →
- Normal Today, cooler than normal for late October (−3.0 °F; normal high: 63 °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 12:43 pm (local time).
The sun in Naksanhaesuyokjang
Sunrise and sunset
- First light 5:50 am
- Full dark 6:28 pm
- Civil dawn 6:21 am
- Civil dusk 5:57 pm
- Solar noon 12:09 pm (38° high)
- Daylight 10 h 42 min (−2 min)
- Evening golden hour 4:53 pm
- Full dark 6:28 pm
Golden hour and the day-night map
Today the sun is 92,344,204 mi away and looks 32′ 11″ across.
The moon in Naksanhaesuyokjang
Moon phase and position
Today the moon is 226,480 mi away and looks 32′ 46″ across.
Solunar periods
Today's activity: medium- 1:28–3:28 am Major · the moon passes overhead · high activity
- 2:00–4:00 pm Major · the moon passes underfoot · high activity
- 9:53–10:53 am Minor · moonset · medium activity
- 7:05–8:05 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 Mon, Nov 2 · 5:29 amNov 2 in 4 days
- New moon Mon, Nov 9 · 4:03 pmNov 9 in 11 days
- First quarter Tue, Nov 17 · 8:48 pmNov 17 in 19 days
- Full moon Tue, Nov 24 · 11:54 pmNov 24 in 26 days
Perigee on October 29, 226,426 mi away, coinciding with the spring tides from October 27 to 29: they will be stronger than usual.
Where to fish in Naksanhaesuyokjang
Piers, ramps and tackle shops nearby
Map: OpenFreeMap · © OpenMapTiles · © OpenStreetMap contributors
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 0.4 mi. It reaches 164 ft at 1.8 mi.
From the shoreline out to sea, heading northeast.
How far from shore
- 16 ft deep0.35 mi
- 33 ft deep0.4 mi
- 66 ft deep0.6 mi
- 164 ft deep1.8 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. Shore diving works here: 33 ft at 0.4 mi and 66 ft at 0.6 mi from shore.
Rough estimate: here the data comes in cells of about 0.3 mi and misses details near shore (rocks, sandbars, small coves).
Source: NOAA ETOPO 2022 (CC0), cells of about 0.3 mi; depth below mean sea level. For reference only: not for navigation or anchoring.
Tides near NaksanhaesuyokjangTides nearby
- Susal-li3.2 mi
- Daepori4.4 mi
- Hwaongchihaesuyokjang5.0 mi
- Sokchohaesuyokjang5.3 mi
- Joumpo-ri6.2 mi
- Dongmyeonghang6.6 mi
- Sokcho6.8 mi
- Jumunjin19 mi
- Kosong20 mi
- Gangneung28 mi
Naksanhaesuyokjang at a glance
- Beach. Coordinates: 38.116° N, 128.636° E.
- It is 47 mi northwest of Donghae City, the main place in Gangwon. The sun rises 3 min later and sets 1 min later than in Donghae City.
- 3.2 mi from Susal-li.
- The nearest tide station, Sokcho, is 6.7 mi to the north.
- Its coast faces northeast.
- Beaches and harbors nearby: Seorakhaesuyokjang (1.2 mi), Jeonjinhang (1.4 mi), Sokcho Ferry Port (1.5 mi), Jeongamhaesuyokjang (1.9 mi).
Questions about NaksanhaesuyokjangQuestions
Where is Naksanhaesuyokjang?
3.2 mi from Susal-li, in Gangwon (South Korea). The shore faces northeast.
What amenities does Naksanhaesuyokjang have?
According to OpenStreetMap: restrooms and parking. Some may be missing or out of date, so ask at the beach.
What time is high tide today in Naksanhaesuyokjang?
Today in Naksanhaesuyokjang there are high tides at 3:54 am (1.1 ft) and 6:33 pm (0.8 ft) and low tides at 11:25 am and 10:26 pm. Tide coefficient 92.
What time is sunset today in Naksanhaesuyokjang?
At 5:30 pm. There is light until the end of civil twilight, at 5:57 pm.
What time is sunrise tomorrow in Naksanhaesuyokjang?
At 6:49 am. First light comes at 5:51 am.
What phase is the moon today?
Waning gibbous, 88% illuminated. New moon on Mon, Nov 9 · 4:03 pm.
When are the next spring tides?
From October 27 to 29, together with the lunar perigee: they will be stronger than usual.
What are today's solunar periods?
Major 1:28–3:28 am, Minor 9:53–10:53 am, Major 2:00–4:00 pm, Minor 7:05–8:05 pm. Today's activity is medium.
What's the weather like today in Naksanhaesuyokjang?
Overcast, from 42 °F to 60 °F, with a light breeze from the southwest (4 mph) and a 0% chance of rain.
How is the sea today in Naksanhaesuyokjang?
Smooth (Douglas 2): 1.0 ft waves with a period of 5.1 s from the northeast. The water is 64.8 °F.
When is the best time to visit Naksanhaesuyokjang?
The best time to visit Naksanhaesuyokjang is from May to June: highs of 71 °F to 75 °F, about 8 rainy days a month and 6 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: Sokcho reference port of the Korea Hydrographic and Oceanographic Agency (KHOA, 국립해양조사원): M2, S2, K1 and O1 from its published harmonic constants, free of use restrictions; the other constituents are inferred from those four by TidePlanet. Sun and moon: our own calculation with astronomy-engine. Places: GeoNames (CC BY 4.0). Coastline: © OpenStreetMap contributors (ODbL).