Surf Forecasts:
Asakawa surf forecast from 4 Jul 2026:
- Best quality surf: Friday 10 Jul, 9PM (local time) - 15ft (4.5m), 18s period, S swell with glassy winds.
- Most powerful swell: Friday 10 Jul, 6PM (local time) - 15ft (4.5m), 18s period, S swell with 12,907 kJ wave energy.
- Next surfable swell (1★+): Sunday 5 Jul, 12AM (local time) - 3ft (0.9m), 5s period with E swell.
Best Forecast Surf Conditions for Asakawa this week:
The surf forecast for Asakawa over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Sunday (Jul 05) at 12AM. The primary swell is predicted to be 0.9m and 5s period with a secondary swell of 0.8m and 5s. Another secondary swell of 0.4m and 6s is also forecast. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at Asakawa in the next 16 days are 4.5m 18s and forecast to arrive on Friday (Jul 10) at 6PM. Winds are predicted to be onshore at the time the swell arrives.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 12AM (Sun 5th Jul) | 3ft (0.9m) 5s |
| Best Surf | 9PM (Fri 10th Jul) | 15ft (4.5m) 18s |
| Most Powerful | 6PM (Fri 10th Jul) | 15ft (4.5m) 18s |
Table - best surf conditions forecast for Asakawa over the next 16 days.
Updates in hr min s Forecast update imminent
Alright, Rusty here with the lowdown for Asakawa.
We’re staring down a long quiet stretch at the start. From Saturday the 4th right through Monday the 6th, it’s flat and useless – not worth wetting a suit. The first chance at anything decent kicks off Tuesday the 7th July.
Tuesday morning the 7th July brings a proper pulse: swell around 5ft out of the SE with a super-long 17-second period. That’s proper groundswell. Combined swell energy is strong at 1452. Winds are light and cross-off from the NE – real clean conditions. This is for the experienced only; with surf over 5ft and that long period, it’s got some punch. Asakawa’s a point break, so it should handle that long-period wave shape fine, but it’s inconsistent, so don’t expect constant sets. Crowds can pop up sometimes.
Wednesday the 8th sees it building: 6ft to 10ft from the SSE with big energy (4780 to 5905). Periods are still long at 17–18 seconds, but the wind turns cross-onshore, putting a bit of texture on the face. It’s big but not glassy. Thursday the 9th holds 12ft sets with massive energy (5927 to 6868), again cross-onshore. Friday the 10th is the biggest: 15ft from the S, 17–18 second periods, combined energy over 10000. But the wind’s cross-onshore or onshore, so it’s raw, bumpy, and only for the absolute hardcore. Saturday the 11th stays heavy at 13ft with onshore winds and storm risks.
The real standout is Sunday the 12th July morning. Swell’s dropped to a still-hefty 8ft from the SSW, 14-second period, and the wind goes dead calm from the E – glassy, perfect conditions. Combined energy is strong at 2521. Those waves will be clean and powerful, but 8ft with a long period is expert-only. It’s the pick of the run if you can handle it. Crowds could be around.
After that, it fades. Monday the 13th morning has 4ft from the S, glassy but ordinary. Tuesday the 14th and beyond drop under 3ft, mostly glassy but small and weak. By the end, it’s tiny again. So, your best bets are Tuesday the 7th and Sunday the 12th mornings – that’s where the magic is.
Water temp is about 76°F, normal for this time of year.
Rusty.
Short Range ForecastHeavy rain (total 29mm), heaviest during Sat morning. Warm (max 29°C on Mon afternoon, min 22°C on Sat night). Wind will be generally light. | Days 4-6 Weather SummaryLight rain (total 5mm), mostly falling on Wed night. Warm (max 28°C on Tue morning, min 24°C on Tue night). Wind will be generally light. | ||||||||||||||||||||
Saturday 4 | Sunday 5 | Monday 6 | Tuesday 7 | Wednesday 8 | Thursday 9 | Friday 10 | |||||||||||||||
AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | |
Swell Height Map |  |  |  |  |  |  |  | ||||||||||||||
Wave Height (m) Direction Period (s) | ESE 9 | SE 9 | E 5 | SSW 7 | SE 9 | ESE 5 | SE 15 | SE 14 | SE 13 | SE 17 | SE 17 | SE 16 | SE 16 | SSE 17 | SSE 16 | SSE 16 | SSE 17 | S 16 | S 17 | S 18 | S 18 |
Wave Graph  | |||||||||||||||||||||
 kJ | 16 | 13 | 37 | 40 | 20 | 52 | 149 | 301 | 347 | 1420 | 2093 | 3502 | 2430 | 5905 | 5002 | 5863 | 6868 | 7710 | 10982 | 12184 | 11776 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | on | glassy | cross-off | on | on | on | cross-on | cross-on | off | cross-off | cross | on | cross-on | cross-on | cross-on | cross-on | on | cross-on | cross-on | on | glassy |
High Tide | 9:11PM1.64m | 8:27AM1.59m | 9:43PM1.63m | 9:16AM1.51m | 10:17PM1.62m | 10:17AM1.42m | 10:55PM1.60m | 11:38AM1.36m | 11:41PM1.58m | 1:20PM1.35m | 00:36AM1.58m | 3:00PM1.43m | 1:41AM1.60m | ||||||||
Low Tide | 2:28PM0.28m | 2:51AM0.86m | 3:02PM0.38m | 3:36AM0.81m | 3:39PM0.51m | 4:28AM0.75m | 4:23PM0.66m | 5:30AM0.68m | 5:17PM0.83m | 6:40AM0.57m | 6:30PM0.98m | 7:54AM0.44m | 8:00PM1.08m | ||||||||
 |  |  |  | |  |  |  | |  | | | | |  | | | | | | | |
 | 4:56 | — | — | 4:56 | — | — | 4:56 | — | — | 4:58 | — | — | 4:58 | — | — | 4:58 | — | — | 4:58 | — | — |
 | — | 7:15 | — | — | 7:15 | — | — | 7:15 | — | — | 7:15 | — | — | 7:15 | — | — | 7:15 | — | — | 7:15 | — |
mm | 11 | 6 | — | 1 | 3 | 7 | — | 1 | — | — | — | — | — | — | 2 | — | — | 3 | — | — | — |
Temp °C | 23 | 23 | 22 | 24 | 24 | 25 | 28 | 29 | 26 | 28 | 28 | 24 | 26 | 25 | 24 | 26 | 26 | 24 | 25 | 25 | 24 |
Feels °C | 27 | 27 | 24 | 28 | 27 | 29 | 30 | 31 | 31 | 30 | 31 | 27 | 30 | 28 | 28 | 29 | 29 | 27 | 28 | 28 | 28 |
Swell 1 Height (m) Direction Period (s) | SSW 5 | SE 9 | ESE 5 | SSW 7 | SSW 6 | SW 6 | SE 15 | SE 14 | SE 13 | SE 17 | SE 17 | SE 16 | SE 16 | SSE 17 | SSE 16 | SSE 16 | SSE 17 | S 16 | S 17 | S 18 | S 18 |
| kJ | 5 | 12 | 25 | 40 | 16 | 9 | 149 | 301 | 347 | 1420 | 2093 | 3502 | 2314 | 5905 | 5002 | 5863 | 6868 | 7710 | 10982 | 12184 | 11776 |
Swell 2 Height (m) Direction Period (s) | ESE 9 | ESE 9 | SSW 6 | ESE 5 | SE 9 | ESE 8 | ESE 4 | SSW 6 | ESE 5 | SSW 7 | SSW 6 | — | SSE 18 | — | — | — | — | S 18 | — | — | — |
| kJ | 16 | 8 | 15 | 11 | 20 | 7 | 11 | 23 | 48 | 29 | 15 | — | 2430 | — | — | — | — | 3442 | — | — | — |
Swell 3 Height (m) Direction Period (s) | SE 9 | ESE 12 | ESE 9 | SE 10 | S 8 | SSE 9 | SSW 6 | S 9 | SE 17 | ESE 4 | — | — | E 7 | — | — | — | — | — | — | — | — |
| kJ | 12 | 13 | 7 | 16 | 1 | 8 | 23 | 2 | 140 | 3 | — | — | 36 | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | SE 2 | SE 4 | E 5 | — | SE 4 | ESE 5 | E 4 | SE 7 | — | — | — | — | — | — | E 5 | E 8 | — | — | — | — | — |
| kJ | 1 | 8 | 37 | — | 17 | 52 | 9 | 22 | — | — | — | — | — | — | 48 | 64 | — | — | — | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 339 | 14 | 0 | 14 | 289 | 11 | 11 | 11 | 0 | 0 | 22 | 11 | 4 | 19 | 43 | 19 | 475 | 19 | 19 | 19 | 0 |
Best forecast wave conditions in Shikoku | |||||||||||||||||||||
Best forecast wave conditions in Japan | |||||||||||||||||||||
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Information about the Asakawa Surf forecast
The above surf forecast table for Asakawa provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Asakawa can be found by selecting the local surf guide option on the grey menu. Our Asakawa surf forecast is unique since it includes wave energy (power) that defines the real feel of the surf rather than just the height or the period. If you surf the same spot (Asakawa) regularly then make a mental note of the wave energy from the surf forecast table each time you go. Very soon you may start to choose your surf days based on the wave energy alone combined with our forecast of favourable offshore wind conditions. Our star ratings will help here and of course you will also find the usual wave height and period predictions on our surf forecasts as well as a full break down of the swell components under our advanced users option (to reveal that, click the little Einstein character under the tide times).
Further information to help with frequently asked questions about our surf forecast for Asakawa may be found under the help tab on the top menu and also by moving your mouse over the question marks on the surf forecast table itself. Please always bear in mind that the forecast is for near-shore open water and local factors at each surf break influence the actual breaking wave height, such as the beach / reef profile, water depths offshore and shelter.
Are you planning a holiday in Shikoku? If you are looking for accommodation near Asakawa, camping, hotels and holiday cottages in Shikoku, consider staying in Anan which is 41 km (25 miles) away. Other places in and around Shikoku where you can find information about places to rent, and car hire include Muroto which is 44 km (27 miles) away, Komatsushima, Aki and Kamojima.
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