Kamakura tides today
- Tide now 3.5 ft ↑ rising · high 5:30 pm (5.1 ft)
- Best time to fish 4:30–5:20 pm average day · 6/10
- Beach day Not today Not a beach day · 1/10
- Waves · water 1.2 ft · 75 °F smooth · 7.1 s from the south-southeast
- Wind · air 2 mph · 58 °F from the N, gusts 11 · partly cloudy
- Surf tomorrow 2.4–3.7 ft Fair day · 5/10 · 4:00–5:00 pm
- Sun 6:00 am–4:51 pm 10 h 51 min of daylight
- Moon 88% · 7:00 pm waning gibbous · rises at 7:00 pm
Today in Kamakura there are high tides at 7:17 am (4.8 ft) and 5:30 pm (5.1 ft) and low tides at 12:14 am and 12:16 pm. Tide coefficient 91. Right now the tide is rising toward the high tide at 5:30 pm. The sun rises at 6:00 am and sets at 4:51 pm: 10 h 51 min of daylight. The moon is 88% illuminated (waning gibbous) and rises at 7:00 pm. Major solunar periods run from 12:42 am to 2:42 am and from 1:14 pm to 3:14 pm. The next spring tides arrive from October 27 to 29. The sea is smooth, with 1.2 ft waves. There's a light air from the north (2 mph). Partly cloudy, 58 °F.
Fishing in Kamakura today
Best time to fish
Solunar activity today: medium- High tide at 5:30 pm, coefficient 85
- Sunset at 4:51 pm, golden hour from 4:15 pm
- Rising pressure (+0.18 inHg in 24 h), light offshore wind (4 mph) and calm sea (1.2 ft waves)
- Waning gibbous: a bit more activity than at the quarters
- Highest tide coefficient today: 91 (spring tides)
Your day at a glance
The best window, 4:30 pm to 5:20 pm, combines the 5:30 pm high tide and sunset, though with rising pressure. Also worth a try from 12:00 am to 1:10 am, with the 12:14 am low tide and a major period, though with rising pressure. Also worth a try from 6:20 am to 8:20 am, with the 7:17 am high tide and sunrise, though with rising pressure.
Species with the most records nearby: striped mullet, Japanese seabass, blackhead seabream and red seabream. October is one of the months when these are seen most: blackhead seabream. What you can catch
Beach day in Kamakura
Is it a beach day?
- Offshore breeze (4 mph)
- Calm for swimming: 1.2 ft waves
- Water at 75 °F (nice)
- Low tide at 12:16 pm: more sand
- Cloudy (89% cloud cover)
- Feels like 59 °F: chilly for the beach
Today, hour by hour
- Swimming Calm · 1.2 ft
1.2 ft waves: calm for swimming. Low rip current risk. Always follow the lifeguard's flags.
- Water 75 °F
Nice for swimming.
- Sun & sunscreen UV 3 · SPF 15
Max UV 3 (low): SPF 15 sunscreen.
- Wind 4 mph
Offshore breeze (4 mph).
- Tide & sand 12:14 am
Low tide at 12:14 am and 12:16 pm: that's when there's the most sand. High tide at 7:17 am and 5:30 pm. Coefficient 91 (spring tides): little sand left at high tide.
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 Kamakura
Map: OpenFreeMap · © OpenMapTiles · © OpenStreetMap contributors
- Yuigahama Beach 0.4 mi · W
- Restrooms
- Parking
- Zaimokuza Playa 0.4 mi · S
- Restrooms
- Parking
- Zushi Beach 1.9 mi · SE
- Restrooms
- Parking
- Isshiki Beach 3.7 mi · SE
- Restrooms
- Parking
- 富士見浜 3.8 mi · W
- Restrooms
- Parking
- 辻堂海岸 5.0 mi · W
- Restrooms
- Parking
- 久留和海岸 5.1 mi · SE
- Restrooms
- 乙舳海岸 5.2 mi · E
- Restrooms
- 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 Kamakura
Webcams provided by windy.com — add a webcam
Tides in Kamakura
Today's high and low tides
- ▼ Low tide 12:14 am -0.1 ft
- ▲ High tide 7:17 am 4.8 ft · coef. 91
- ▼ Low tide 12:16 pm 3.2 ft
- ▲ Next high tide 5:30 pm 5.1 ft · coef. 85
↑ Rising The tide is rising. 3 h 52 min to high tide at 5:30 pm.
Tide coefficient 91 for the 7:17 am high tide and 85 for the 5:30 pm high tide. Spring tides. The water rises and falls 5.2 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 16 (5.2 ft) and the lowest, on December 24 (-0.6 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 27 (coefficient 106, 5.2 ft range). The smallest, on October 19 (coefficient 23, 2.2 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 | 6:00 am · 4:51 pm | Low tide 12:14 am · -0.1 ft | High tide 7:17 am · 4.8 ft | Low tide 12:16 pm · 3.2 ft | High tide 5:30 pm · 5.1 ft | Coef. 91 | 88% | Major periods 12:42 am · 1:14 pm | Medium |
| Fri 30 | 6:01 am · 4:50 pm | Low tide 12:59 am · 0.0 ft | High tide 8:15 am · 4.6 ft | Low tide 12:51 pm · 3.5 ft | High tide 6:00 pm · 4.9 ft | Coef. 76 | 80% | Major periods 1:47 am · 2:19 pm | Medium |
| Sat 31 | 6:02 am · 4:49 pm | Low tide 1:50 am · 0.3 ft | High tide 9:26 am · 4.3 ft | Low tide 1:32 pm · 3.7 ft | High tide 6:32 pm · 4.6 ft | Coef. 60 | 69% | Major periods 2:51 am · 3:22 pm | Medium |
| Sun 1 | 6:03 am · 4:48 pm | Low tide 2:49 am · 0.6 ft | High tide 10:58 am · 4.1 ft | Low tide 2:45 pm · 3.8 ft | High tide 7:11 pm · 4.2 ft | Coef. 44 | 58% | Major periods 3:51 am · 4:20 pm | Medium |
| Mon 2 | 6:04 am · 4:47 pm | Low tide 4:01 am · 1.0 ft | High tide 12:32 pm · 4.1 ft | Low tide 5:35 pm · 3.6 ft | High tide 8:36 pm · 3.7 ft | Coef. 34 | Last quarter | Major periods 4:47 am · 5:13 pm | Medium |
| Tue 3 | 6:05 am · 4:46 pm | Low tide 5:24 am · 1.3 ft | High tide 1:23 pm · 4.1 ft | Low tide 7:21 pm · 3.1 ft | High tide 11:50 pm · 3.5 ft | Coef. 42 | 36% | Major periods 5:38 am · 6:02 pm | Medium |
| Wed 4 | 6:06 am · 4:45 pm | Low tide 6:42 am · 1.6 ft | High tide 1:55 pm · 4.2 ft | Low tide 8:05 pm · 2.4 ft | — | Coef. 49 | 26% | Major periods 6:26 am · 6:48 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
Tides from the Shonan Port station (JMA), 3.7 mi from Kamakura. Times and heights are its predictions.
Station data attribution: Source: Japan Meteorological Agency website (出典：気象庁ホームページ), tide table (潮位表) for Shonan Port (湘南港), https://www.data.jma.go.jp/kaiyou/db/tide/suisan/suisan.php?stn=D8. Public Data License (Version 1.0) (https://www.digital.go.jp/resources/open_data/public_data_license_v1.0), compatible with CC BY 4.0. Modified by TidePlanet (気象庁「潮位表」を加工して作成): harmonic constants fitted from the hourly prediction of 2025–2026; not an official JMA product.
The sea at Kamakura
Sea stateSea state: smooth
The waves you may find
- Most commonMost common0.6 ft
- Significant1.2 ft
- Highest expectedHighest2.5 ft
One wave in seven is higher than the significant height, and about 3 times a day one reaches 2.5 ft. Before heading out, expect waves of up to 2.5 ft.
Wind on the coast and offshore
Offshore wind. The coast faces south 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 build over the next few days. The biggest waves arrive on Monday 2: 4.5 ft with a period of 8 s, from the south (moderate).
Water temperature
Water temperature →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 73.9 °F by Wednesday 4.
Water warmer than normal for late October (+5.9 °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 1:39 pm (local time).
Surf in Kamakura today
Surf today
Poor- 0.8–1.2 ft surf at the shore, small: good for learning or a longboard
- 0.9 ft swell at 6 s from the south, short: weak, messy waves
- Almost no wind (4 mph): glassy water
- Falling tide (low tide at 12:16 pm)
- Light: First light 5:34 am · sunrise 6:00 am · sunset 4:51 pm · last light 5:17 pm
- Tide: low 12:14 am (-0.1 ft), high 7:17 am (4.8 ft), low 12:16 pm (3.2 ft) and high 5:30 pm (5.1 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 74.1 °F–75.7 °F: a rash guard or a neoprene top.
- Energy: 6 kJ · Low power
Today’s surf at a glance
The best window, 8:00 am to 12:00 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.
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 Kamakura today
Diving and snorkeling today
Likely visibility: good- Slack water around low tide (12:16 pm): little current from 11:40 am to 12:50 pm
- 0.8 ft swell at 7 s from the south: barely any surge
- Light offshore wind (4 mph)
- 0.5 mph current toward the northwest, weak (model)
- Sun high: more light underwater
- Slack water today: low tide 12:14 am (11:59 pm–12:30 am), high tide 7:17 am (6:50–7:40 am), low tide 12:16 pm (11:40 am–12:50 pm) and high tide 5:30 pm (5:10–5:50 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 74.1–75.7 °F: a 3 mm wetsuit.
- Snorkeling: good, calm sea and light wind.
- Night dive: dark from 5:17 pm. Waning gibbous (88%), rising at 7:00 pm: a bright night.
Your diving day at a glance
The best window, 10:50 am to 1:40 pm, combines slack water at low tide, little swell, light wind, weak current and the sun high. Also good from 4:00 pm to 4:50 pm, with little swell, light wind and weak current. Also worth a look from 6:30 am to 8:10 am, 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
- 逗子ダイビングサービス 1.3 mi
- DIVE.com（Shonandive.com Co.,Ltd.） 1.9 mi
- ダイビングショップナナ 2.9 mi
- ウエストビーチダイビングセンター 3.1 mi
- オートマリン 3.1 mi
- 葉山ダイビングセンター 3.2 mi
- Grampus 3.6 mi
- 湘南江ノ島ダイビング 6.2 mi
- ココマジック 6.5 mi
- Blue Cube 7.0 mi
- Technical Diving Center Japan 7.0 mi
- Diving shop oasis 7.8 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
Sites: © OpenStreetMap contributors (ODbL).
Weather in Kamakura
Now in Kamakura
- Low / high
- 47 / 60 °F
- Rain
- 0.00 in · 16%
- Clouds
- 69%
- Humidity
- 66%
- Dew pointDew point
- 47 °F
- Visibility
- 15 mi
- UV indexUV
- 2 · low
- Air qualityAir
- Moderate · 51
- 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 (−0.04 inHg in 3 hours). Over the next 48 hours: −0.46 inHg. 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 | Overcast | Mainly clear | Overcast | Overcast | Overcast | Partly cloudy | Mainly clear | Partly cloudy |
| Temperature | 52° | 50° | 47° | 52° | 56° | 60° | 56° | 54° |
| Wind (mph) | 6 NNE | 6 NNE | 5 N | 4 NNW | 4 NNW | 2 NNE | 5 N | 3 N |
| Gusts | 11 | 9 | 11 | 12 | 13 | 9 | 10 | 7 |
| Waves | 1.7 ft | 1.4 ft | 1.2 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 |
- 3:00 pm 60° 2 NNE 1.2 ft
- 6:00 pm 56° 5 N 1.2 ft
- 9:00 pm 54° 3 N 1.2 ft
- 12:00 am 53° 4 N 1.4 ft
- 3:00 am 52° 3 NNE 1.7 ft
- 6:00 am 52° 3 NNE 2.3 ft
- 9:00 am 54° 2 NW 3.0 ft
- 12:00 pm 64° 3 SE 3.3 ft
Next 14 daysComing days
| Day | Sky | Low / high | Max wind | Max wave | High tides |
|---|---|---|---|---|---|
| Today · 29 | 47 / 60 °F | 6 mph N | 1.7 ft | 7:17 am · 5:30 pm | |
| Fri 30 | 52 / 68 °F | 5 mph N | 3.7 ft | 8:15 am · 6:00 pm | |
| Sat 31 | 54 / 71 °F | 9 mph NNW | 3.6 ft | 9:26 am · 6:32 pm | |
| Sun 1 | 52 / 63 °F | 6 mph NNE | 3.9 ft | 10:58 am · 7:11 pm | |
| Mon 2 | 53 / 65 °F | 9 mph W | 4.5 ft | 12:32 pm · 8:36 pm | |
| Tue 3 | 53 / 70 °F | 6 mph N | 4.3 ft | 1:23 pm · 11:50 pm | |
| Wed 4 | 54 / 60 °F | 9 mph N | 3.1 ft | 1:55 pm | |
| Thu 5 | 54 / 61 °F | 9 mph N | 3.3 ft | 1:38 am · 2:19 pm | |
| Fri 6 | 52 / 67 °F | 10 mph N | 3.5 ft | 2:44 am · 2:42 pm | |
| Sat 7 | 53 / 59 °F | 9 mph NE | 3.6 ft | 3:36 am · 3:05 pm | |
| Sun 8 | 49 / 54 °F | 6 mph NNW | 2.4 ft | 4:20 am · 3:28 pm | |
| Mon 9 | 48 / 56 °F | 10 mph NNE | 2.8 ft | 5:00 am · 3:53 pm | |
| Tue 10 | 49 / 60 °F | 6 mph NNE | 2.0 ft | 5:39 am · 4:19 pm | |
| Wed 11 | 48 / 59 °F | 6 mph NNW | 2.0 ft | 6:18 am · 4:45 pm |
- Fri 30 Light drizzle 52° / 68° 3.7 ft
- Sat 31 Light drizzle 54° / 71° 3.6 ft
- Sun 1 Overcast 52° / 63° 3.9 ft
- Mon 2 Heavy drizzle 53° / 65° 4.5 ft
- Tue 3 Overcast 53° / 70° 4.3 ft
- Wed 4 Light rain 54° / 60° 3.1 ft
- Thu 5 Light rain 54° / 61° 3.3 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 Partly agree · medium confidence: unsure about wind today. See the models →
- Outlook Next few weeks, compared with normal: normal temperatures, normal rain and a warmer sea. See the outlook →
- Normal Today, cooler than normal for late October (−7.3 °F; normal high: 67 °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 1:39 pm (local time).
The sun in Kamakura
Sunrise and sunset
- First light 5:04 am
- Full dark 5:47 pm
- Civil dawn 5:34 am
- Civil dusk 5:17 pm
- Solar noon 11:26 am (41° high)
- Daylight 10 h 51 min (−2 min)
- Evening golden hour 4:15 pm
- Full dark 5:47 pm
Golden hour and the day-night map
Today the sun is 92,344,939 mi away and looks 32′ 11″ across.
The moon in Kamakura
Moon phase and position
Today the moon is 226,480 mi away and looks 32′ 46″ across.
Solunar periods
Today's activity: medium- 12:42–2:42 am Major · the moon passes overhead · high activity
- 1:14–3:14 pm Major · the moon passes underfoot · high activity
- 8:57–9:57 am Minor · moonset · medium activity
- 6:30–7:30 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 Kamakura
Piers, ramps and tackle shops nearby
Map: OpenFreeMap · © OpenMapTiles · © OpenStreetMap contributors
- 江の島湘南大桟橋 3.5 mi
- 小浜 3.8 mi
- 鵜ノ鼻 3.9 mi
- 裂磯 4.0 mi
- 竜池窟 4.1 mi
- 燈籠下 4.2 mi
- Boat ramp 8.3 mi
- Enoshima Yacht Harbour 3.6 mi
- Fukaura Boat Park 5.1 mi
- 上州屋 3.2 mi
- 弁天屋 4.6 mi
- Fuel dock 7.5 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
Shallow, gradualShallow, gradual bottom: you need to go 1.3 mi out for 33 ft of water. It reaches 164 ft at 3 mi.
From the shoreline (0.25 mi from Kamakura) out to sea, heading south.
How far from shore
- 16 ft deep0.65 mi
- 33 ft deep1.3 mi
- 66 ft deep2.2 mi
- 164 ft deep3 mi
For fishing, swimming and diving
- Shore fishing. Shallow, gradual bottom (16 ft at 0.65 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 1.3 mi. For dives deeper than 33 ft, go by boat.
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.
Nearest lighthouse
Shōnan Port Lighthouse 3.4 mi west
Other lighthouses nearby: Enoshima Sea Candle (3.9 mi west).
Data from Wikidata. For reference only: not for navigation. Wikidata · Sources and licenses
Tides near KamakuraTides nearby
- Zushi2.1 mi
- Hayama2.9 mi
- Koshigoe2.9 mi
- Fujisawa4.8 mi
- Sugita6.0 mi
- Yokosuka7.0 mi
- Isogo7.9 mi
- Chigasaki8.2 mi
- Enokichō9.1 mi
- Negishichō9.2 mi
Kamakura at a glance
- Town or city of about 172,929 people. Coordinates: 35.311° N, 139.547° E.
- It is 10 mi southwest of Yokohama, the main place in Kanagawa. The sun rises at the same time and sets 1 min later than in Yokohama.
- The nearest tide station, Shonan Port, is 3.7 mi to the west.
- Its coast faces south.
- Beaches and harbors nearby: Yuiga Hama (0.4 mi), Zaimokuza Kaigan (0.4 mi), Zushi Kaigan (1.9 mi), Shichiriga Hama (2.0 mi).
Questions about KamakuraQuestions
What time is high tide today in Kamakura?
Today in Kamakura there are high tides at 7:17 am (4.8 ft) and 5:30 pm (5.1 ft) and low tides at 12:14 am and 12:16 pm. Tide coefficient 91.
What time is sunset today in Kamakura?
At 4:51 pm. There is light until the end of civil twilight, at 5:17 pm.
What time is sunrise tomorrow in Kamakura?
At 6:01 am. First light comes at 5:05 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 12:42–2:42 am, Minor 8:57–9:57 am, Major 1:14–3:14 pm, Minor 6:30–7:30 pm. Today's activity is medium.
What's the weather like today in Kamakura?
Overcast, from 47 °F to 60 °F, with a light air from the north (2 mph) and a 16% chance of rain.
How is the sea today in Kamakura?
Smooth (Douglas 2): 1.2 ft waves with a period of 7.1 s from the south-southeast. The water is 75.4 °F.
When is the best time to visit Kamakura?
The best time to visit Kamakura is in May and from July to August: highs of 72 °F to 86 °F, about 12 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: Shonan Port point of the Japan Meteorological Agency (JMA) tide tables. 出典：気象庁ホームページ, under the Public Data License 1.0 (compatible with CC BY 4.0); constants fitted by TidePlanet from two years of its hourly predictions (気象庁「潮位表」を加工して作成). Not an official JMA publication. Sun and moon: our own calculation with astronomy-engine. Places: GeoNames (CC BY 4.0). Coastline: © OpenStreetMap contributors (ODbL).