Iwanai tides today
- Tide now 0.9 ft ↓ falling · low 10:41 pm (0.9 ft)
- Best time to fish 9:40–11:40 pm average day · 6/10
- Beach day Not today Not a beach day · 0/10
- Waves · water 5.9 ft · 58 °F moderate · 7.4 s from the west-southwest
- Wind · air 12 mph · 48 °F from the SE, gusts 25 · light drizzle
- Sun 6:08 am–4:35 pm 10 h 27 min of daylight
- Moon 88% · 6:25 pm waning gibbous · rises at 6:25 pm
- Diving tomorrow 11:30 am–1:00 pm good day · 7/10
- Thunderstorm Advisory (雷注意報) · Iwanai Town: take care. Until further notice. Japan Meteorological Agency (JMA), issued today at 9:32 am · Public Data License 1.0
Official text
Japanese
石狩・空知・後志地方雷注意報
石狩、空知、後志地方では、竜巻などの激しい突風や急な強い雨、落雷に注意してください。
岩内町：雷注意報（竜巻、ひょう）（発表）出典：気象庁ホームページ (https://www.jma.go.jp/). TidePlanet has extracted this area’s warnings from the JMA’s, translated their names and converted their figures to the chosen units: this is not an official JMA publication.
Today in Iwanai there are high tides at 3:40 am (1.0 ft) and 7:10 pm (1.0 ft) and low tides at 11:22 am and 10:41 pm. Tide coefficient 97. Right now the tide is falling toward the low tide at 10:41 pm. The sun rises at 6:08 am and sets at 4:35 pm: 10 h 27 min of daylight. The moon is 88% illuminated (waning gibbous) and rises at 6:25 pm. Major solunar periods run from 12:38 am to 2:38 am and from 1:10 pm to 3:10 pm. The next spring tides arrive from October 27 to 29. The sea is moderate, with 5.9 ft waves. There's a gentle breeze from the southeast (12 mph). Light drizzle, 48 °F.
Fishing in Iwanai today
Best time to fish
Solunar activity today: medium- High tide at 7:10 pm, coefficient 92
- Minor period 5:55–6:55 pm (moonrise)
- Steady pressure (30.06 inHg), light offshore wind (11 mph) and 5.8 ft waves
- Waning gibbous: a bit more activity than at the quarters
- Highest tide coefficient today: 97 (spring tides)
Your day at a glance
The best window, 6:10 pm to 7:00 pm, combines the 7:10 pm high tide and moonrise. Also good from 9:40 pm to 11:40 pm, with the 10:41 pm low tide and falling pressure.
Beach day in Iwanai
Is it a beach day?
- Low tide at 11:22 am: more sand
- Cloudy (84% cloud cover)
- Feels like 44 °F: chilly for the beach
- Rain (0.04 in)
- Light offshore wind (11 mph): it blows floats and inflatables out to sea
- Dangerous for swimming: 7.3 ft waves every 7 s; high rip current risk
Dangerous surf during beach hours. Stay out if the red flag is up, and never swim where there is no lifeguard.
Today, hour by hour
- Swimming Dangerous · 7.3 ft
7.3 ft waves every 7 s: dangerous for swimming. Stay out if the red flag is up. High rip current risk. If you're caught in a rip current, don't swim against it: swim parallel to shore and wave for help. Always follow the lifeguard's flags.
- Water 58 °F
Very cold: ease in and keep swims short.
- Sun & sunscreen UV 2 · SPF 15
Max UV 2 (low): SPF 15 sunscreen.
- Wind 11 mph
Offshore breeze (11 mph). Watch floats and inflatables: offshore wind carries them out to sea.
- Tide & sand 10:41 pm
Low tide at 11:22 am and 10:41 pm: that's when there's the most sand. High tide at 3:40 am and 7:10 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 Iwanai
We don't know of any named beaches within 6.2 mi of Iwanai.
Missing one? Beaches come from OpenStreetMap: you can add it there. Add or fix on OpenStreetMap
Beaches and amenities: © OpenStreetMap contributors (ODbL).
Webcams near Iwanai
Webcams provided by windy.com — add a webcam
Tides in Iwanai
Today's high and low tides
- ▲ High tide 3:40 am 1.0 ft · coef. 97
- ▼ Low tide 11:22 am 0.1 ft
- ▲ High tide 7:10 pm 1.0 ft · coef. 92
- ▼ Next low tide 10:41 pm 0.9 ft
↓ Falling The tide is falling. 1 h 31 min to low tide at 10:41 pm.
Tide coefficient 97 for the 3:40 am high tide and 92 for the 7:10 pm high tide. Spring tides. The water rises and falls 0.9 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 July 15 (1.4 ft) and the lowest, on April 18 (-0.3 ft).
Mixed: two high and two low tides a day, but of quite different heights.
Heights above NLLW. Astronomical prediction: wind and air pressure can raise or lower the water by a few inches, and more in a storm. Not for navigation. NLLW
Tide coefficient and range in October
The biggest tides of the month came from October 27 to 28 (coefficient 101, 0.9 ft range). The smallest, from October 19 to 20 (coefficient 20, 0.5 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 | 6:08 am · 4:35 pm | High tide 3:40 am · 1.0 ft | Low tide 11:22 am · 0.1 ft | High tide 7:10 pm · 1.0 ft | Low tide 10:41 pm · 0.9 ft | Coef. 97 | 88% | Major periods 12:38 am · 1:10 pm | Medium |
| Fri 30 | 6:09 am · 4:33 pm | High tide 4:15 am · 1.1 ft | Low tide 12:17 pm · 0.2 ft | — | — | Coef. 88 | 80% | Major periods 1:43 am · 2:15 pm | High |
| Sat 31 | 6:11 am · 4:32 pm | High tide 4:56 am · 1.1 ft | Low tide 1:18 pm · 0.2 ft | — | — | Coef. 75 | 69% | Major periods 2:47 am · 3:18 pm | Medium |
| Sun 1 | 6:12 am · 4:31 pm | High tide 5:46 am · 1.0 ft | Low tide 2:29 pm · 0.3 ft | — | — | Coef. 60 | 58% | Major periods 3:47 am · 4:16 pm | Medium |
| Mon 2 | 6:13 am · 4:29 pm | High tide 7:02 am · 0.9 ft | Low tide 3:50 pm · 0.3 ft | — | — | Coef. 48 | Last quarter | Major periods 4:43 am · 5:09 pm | Medium |
| Tue 3 | 6:14 am · 4:28 pm | High tide 9:00 am · 0.8 ft | Low tide 5:15 pm · 0.3 ft | — | — | Coef. 46 | 36% | Major periods 5:34 am · 5:58 pm | Medium |
| Wed 4 | 6:16 am · 4:27 pm | High tide 12:47 am · 0.7 ft | Low tide 6:02 am · 0.6 ft | High tide 11:00 am · 0.7 ft | Low tide 6:25 pm · 0.3 ft | Coef. 54 | 26% | Major periods 6:22 am · 6:44 pm | Medium |
▲ high tide · ▼ low tide · heights above NLLW. 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 Iwanai station (TICON-4), 0.9 mi from Iwanai. Times and heights are its predictions.
Station data attribution: Slackwater database (https://github.com/openwatersio/slackwater-database). Source: Hart-Davis, M., Dettmering, D., Seitz, F. (2025), TICON-4: TIdal CONstants based on GESLA-4 sea-level records, SEANOE, https://doi.org/10.17882/109129. Licensed CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/). Modified: see https://github.com/openwatersio/slackwater-database#modifications-to-source-data
The sea at Iwanai
Sea stateSea state: moderate
The waves you may find
- Most commonMost common3.0 ft
- Significant5.9 ft
- Highest expectedHighest12 ft
One wave in seven is higher than the significant height, and about 3 times a day one reaches 12 ft. Before heading out, expect waves of up to 12 ft.
Wind on the coast and offshore
Offshore wind. The coast faces west 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 Thursday 29: 10 ft with a period of 8 s, from the west-northwest (rough).
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 55.6 °F by Wednesday 4.
Water colder than normal for late October (−2.3 °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 9:10 pm (local time).
Surf in Iwanai today
Surf today
Good- 3.1–4.8 ft surf at the shore, a good size with some punch
- 4.7 ft swell at 6 s from the west, short: weak, messy waves
- Light offshore wind (11 mph): it holds up and grooms the waves
- Rising tide (high tide at 7:10 pm)
- Light: First light 5:39 am · sunrise 6:08 am · sunset 4:35 pm · last light 5:04 pm
- Tide: high 3:40 am (1.0 ft), low 11:22 am (0.1 ft), high 7:10 pm (1.0 ft) and low 10:41 pm (0.9 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 57.6 °F: a 4/3 fullsuit (booties if you run cold).
- Energy: 125 kJ · Medium power
Today’s surf at a glance
The best window, 2:00 pm to 5:00 pm, has a good size and light offshore wind, though with a short-period swell. 9:00 am to 11:00 am can also work, with a good size, though with 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 Iwanai today
Diving and snorkeling today
Likely visibility: poor- Slack water around low tide (11:22 am): little current from 11:07 am to 11:40 am
- 4.6 ft swell at 6 s from the west: some surge on the bottom
- Light cross-shore wind (11 mph)
- 0.4 mph current toward the southwest, weak (model)
- Sun high: more light underwater
- Slack water today: high tide 3:40 am (3:20–4:00 am), low tide 11:22 am (11:07–11:40 am), high tide 7:10 pm (6:40–7:50 pm) and low tide 10:41 pm (9:40–11:40 pm)
- Likely visibility: poor. Swell (up to 8.7 ft at 9 s), rain (0.82 in) and wind over the last few days have stirred up the water. Based on the last 24 hours of data.
- Water at 57.6 °F: a 7 mm wetsuit, with hood and booties.
- Snorkeling: better not, with these waves, wind or current.
- Night dive: dark from 5:04 pm. Waning gibbous (88%), rising at 6:25 pm: a bright night.
Your diving day at a glance
The best window, 10:50 am to 12:20 pm, combines slack water at low tide, light wind, weak current and the sun high, though with some swell.
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
We have no dive sites, dive shops or wrecks on record within 12 mi of Iwanai.
If you know one, you can add it to OpenStreetMap and it will show up here after the next update. Missing one? Add it to OpenStreetMap
Sites: © OpenStreetMap contributors (ODbL).
Weather in Iwanai
Now in Iwanai
- Low / high
- 42 / 52 °F
- Rain
- 0.44 in · 100%
- Clouds
- 70%
- Humidity
- 88%
- Dew pointDew point
- 44 °F
- Visibility
- 6.1 mi
- UV indexUV
- 0 · low
- Air qualityAir
- Fair · 28
- 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). Over the next 48 hours: −0.22 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 | Light drizzle | Light drizzle | Light drizzle | Light drizzle | Overcast | Overcast | Drizzle | Rain |
| Temperature | 42° | 43° | 44° | 46° | 52° | 51° | 47° | 48° |
| Wind (mph) | 19 WNW | 20 WNW | 11 WNW | 9 SW | 11 SW | 11 S | 11 S | 12 SE |
| Gusts | 36 | 39 | 30 | 21 | 20 | 21 | 21 | 25 |
| Waves | 10 ft | 9.5 ft | 7.8 ft | 6.2 ft | 5.1 ft | 5.1 ft | 5.7 ft | 6.0 ft |
| Rain | 0.01 in | 0.00 in | 0.00 in | 0.00 in | 0.00 in | 0.00 in | 0.03 in | 0.10 in |
- 9:00 pm 48° 12 SE 6.0 ft
- 12:00 am 47° 7 SSE 5.2 ft
- 3:00 am 46° 6 SE 4.5 ft
- 6:00 am 46° 8 ESE 3.9 ft
- 9:00 am 54° 8 SE 3.5 ft
- 12:00 pm 62° 9 S 3.3 ft
- 3:00 pm 61° 7 SSW 3.2 ft
- 6:00 pm 55° 2 SSW 3.4 ft
Next 14 daysComing days
| Day | Sky | Low / high | Max wind | Max wave | High tides |
|---|---|---|---|---|---|
| Today · 29 | 42 / 52 °F | 20 mph SW | 10 ft | 3:40 am · 7:10 pm | |
| Fri 30 | 45 / 62 °F | 9 mph SSE | 5.2 ft | 4:15 am | |
| Sat 31 | 41 / 55 °F | 22 mph W | 8.8 ft | 4:56 am | |
| Sun 1 | 39 / 43 °F | 26 mph WNW | 10.0 ft | 5:46 am | |
| Mon 2 | 39 / 47 °F | 6 mph SE | 4.7 ft | 7:02 am | |
| Tue 3 | 42 / 46 °F | 19 mph WNW | 4.6 ft | 9:00 am | |
| Wed 4 | 39 / 47 °F | 17 mph W | 5.4 ft | 12:47 am · 11:00 am | |
| Thu 5 | 38 / 53 °F | 7 mph ESE | 3.4 ft | 12:54 am · 12:45 pm | |
| Fri 6 | 43 / 51 °F | 19 mph NW | 7.8 ft | 1:06 am · 2:09 pm | |
| Sat 7 | 37 / 42 °F | 24 mph WNW | 13 ft | 1:19 am · 3:13 pm | |
| Sun 8 | 34 / 37 °F | 16 mph WNW | 9.8 ft | 1:35 am · 4:07 pm | |
| Mon 9 | 32 / 38 °F | 12 mph NW | 6.8 ft | 1:52 am · 4:54 pm | |
| Tue 10 | 33 / 44 °F | 17 mph N | 12 ft | 2:12 am · 5:37 pm | |
| Wed 11 | 36 / 40 °F | 23 mph NNW | 19 ft | 2:35 am · 6:19 pm |
- Fri 30 Light drizzle 45° / 62° 5.2 ft
- Sat 31 Light rain 41° / 55° 8.8 ft
- Sun 1 Heavy drizzle 39° / 43° 10.0 ft
- Mon 2 Light drizzle 39° / 47° 4.7 ft
- Tue 3 Light rain 42° / 46° 4.6 ft
- Wed 4 Drizzle 39° / 47° 5.4 ft
- Thu 5 Drizzle 38° / 53° 3.4 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: a bit cooler and normal rain. See the outlook →
- Normal Today, normal highs for late October (51 °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 9:10 pm (local time).
The sun in Iwanai
Sunrise and sunset
- First light 5:05 am
- Full dark 5:37 pm
- Civil dawn 5:39 am
- Civil dusk 5:04 pm
- Solar noon 11:22 am (34° high)
- Daylight 10 h 27 min (−3 min)
- Evening golden hour 3:55 pm
- Full dark 5:37 pm
Golden hour and the day-night map
Today the sun is 92,345,004 mi away and looks 32′ 11″ across.
The moon in Iwanai
Moon phase and position
Today the moon is 226,480 mi away and looks 32′ 46″ across.
Solunar periods
Today's activity: medium- 12:38–2:38 am Major · the moon passes overhead · high activity
- 1:10–3:10 pm Major · the moon passes underfoot · high activity
- 9:23–10:23 am Minor · moonset · medium activity
- 5:55–6:55 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 Iwanai
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 0.6 mi from shore and 33 ft at 0.8 mi. It reaches 164 ft at 1.6 mi.
From the shoreline (0.75 mi from Iwanai) out to sea, heading west.
How far from shore
- 16 ft deep0.6 mi
- 33 ft deep0.8 mi
- 66 ft deep1.2 mi
- 164 ft deep1.6 mi
For fishing, swimming and diving
- Shore fishing. Shallow, gradual bottom (16 ft at 0.6 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 0.8 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.
Tides near IwanaiTides nearby
- Tomari6.4 mi
- Kamoenai12 mi
- Suttsu19 mi
- Yoichi21 mi
- Furubira22 mi
- Funama22 mi
- Rebun28 mi
- Otaru29 mi
- Toyoura30 mi
- Nagatoyomachi30 mi
Iwanai at a glance
- Town or city of about 13,210 people. Coordinates: 42.974° N, 140.509° E.
- It is 84 mi north of Hakodate, the main place in Hokkaido. The sun rises 3 min later and sets 1 min earlier than in Hakodate.
- The nearest tide station, Iwanai, is 0.9 mi to the north.
- Its coast faces west.
- Beaches and harbors nearby: Iwanai-kō (1.3 mi).
Questions about IwanaiQuestions
What time is high tide today in Iwanai?
Today in Iwanai there are high tides at 3:40 am (1.0 ft) and 7:10 pm (1.0 ft) and low tides at 11:22 am and 10:41 pm. Tide coefficient 97.
What time is sunset today in Iwanai?
At 4:35 pm. There is light until the end of civil twilight, at 5:04 pm.
What time is sunrise tomorrow in Iwanai?
At 6:09 am. First light comes at 5:07 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 12:38–2:38 am, Minor 9:23–10:23 am, Major 1:10–3:10 pm, Minor 5:55–6:55 pm. Today's activity is medium.
What's the weather like today in Iwanai?
Rain, from 42 °F to 52 °F, with a gentle breeze from the southeast (12 mph) and a 100% chance of rain.
How is the sea today in Iwanai?
Moderate (Douglas 4): 5.9 ft waves with a period of 7.4 s from the west-southwest. The water is 57.7 °F.
When is the best time to visit Iwanai?
The best time to visit Iwanai is from July to August: highs of 72 °F to 74 °F, about 10 rainy days a month and 5 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: Iwanai station, with constants from TICON-4 (Hart-Davis, Dettmering and Seitz, 2025, SEANOE), licensed CC BY 4.0, via Slackwater database (changes). Sun and moon: our own calculation with astronomy-engine. Places: GeoNames (CC BY 4.0). Coastline: © OpenStreetMap contributors (ODbL).