Overview

Iwanai is a kitesurfing spot on the west coast of Hokkaido. This fishing port offers powerful west to northwest wind conditions, typical of Hokkaido's Sea of Japan coast.

The water is exposed to the Sea of Japan. Tides are present. Suited for intermediate to advanced riders.

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Spot forecast for Iwanai

Sunrise 05:57 · Sunset 16:48

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< 7 kn7–12 kn13–20 kn21–30 kn31–40 kn41+ kn Gusts Your minimum: 7 kn

Forecasts provided by Open-Meteo

Swell and waves

Swell and tides over 8 days. Premium members see the swell and tides over 8 days. Without a subscription: 5 days.

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Wave height: < 0.5 m 0.5–1 m 1–2 m 2–3 m ≥ 3 m

Swell data by Open-Meteo Marine

Tides

Heights above lowest astronomical tide, in the spot's local time. Computed 7.2 km from the spot.

Tuesday 20 October High tide 04:08 · 0.3 m Low tide 17:41 · 0.1 m
Wednesday 21 October High tide 02:21 · 0.3 m Low tide 18:39 · 0.1 m
Thursday 22 October High tide 02:06 · 0.3 m Low tide 08:01 · 0.2 m High tide 11:40 · 0.2 m Low tide 19:25 · 0.1 m
Friday 23 October High tide 02:08 · 0.2 m Low tide 08:10 · 0.2 m High tide 13:17 · 0.2 m Low tide 20:04 · 0.1 m
Saturday 24 October High tide 02:04 · 0.2 m Low tide 08:20 · 0.1 m High tide 14:25 · 0.3 m Low tide 20:36 · 0.2 m

Iwanai: when to go?

Rideable days and hours computed for a minimum wind of 7 knots · log in to set your own (foil, twin-tip…)

Season · peak

224h

in December · 23.5 rideable days

The season runs from October to March, peaking in December: 18 rideable days a month and 224 hours of usable wind, at 4 °C. The low point is August, at 6.5 days.

Rideable days per month

Wind strength when it is rideable

7-12 knots · 77%13-20 knots · 23%21-30 knots · under 1%

When the spot works, wind sits mostly between 7 and 12 knots — 77% of rideable hours. Big-kite territory. The coldest month is January, at 0 °C. The wettest month is December, with 191 mm.

Monthly averages: Iwanai

Monthly averages — Iwanai — averaged over 2 years of records — Weather data by Open-Meteo.com — How it is calculated
Month	Rideable days	Usable wind	Temperature	Rain
January	16.5	131 h	0 °C	171 mm
February	17.5	170 h	0 °C	126 mm
March	19.5	165 h	3 °C	116 mm
April	9.5	80 h	11 °C	105 mm
May	10.5	73 h	17 °C	109 mm
June	7.0	49 h	22 °C	132 mm
July	7.0	41 h	26 °C	153 mm
August	6.5	46 h	26 °C	162 mm
September	13.0	87 h	23 °C	163 mm
October	14.5	125 h	15 °C	172 mm
November	18.0	162 h	8 °C	177 mm
December	23.5	224 h	0 °C	191 mm

Photo gallery of Iwanai

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Technical details of Iwanai spot

The spot works with winds from N, WSW, W, WNW, NW, NNW.

Rideable Not rideable

Spot opening date · Required level

Spot opening date: Open all year round
Required level: Intermediate

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Ogimet - Kutchan (Japan)22.6 kmsource ogimet

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Webcams near Iwanai

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Nearby spots

All spots: Hokkaidō

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Iwanai kitesurf and wingfoil spot