Surf Forecasts:
Asakawa surf forecast from 24 Aug 2026:
- Best quality surf: Tuesday 25 Aug, 3AM (local time) - 8ft (2.5m), 15s period, SSE swell with glassy winds.
- Most powerful swell: Tuesday 25 Aug, 9AM (local time) - 10ft (3.0m), 14s period, SSE swell with 3,875 kJ wave energy.
- Next surfable swell (1★+): Tuesday 25 Aug, 3AM (local time) - 8ft (2.5m), 15s period with SSE 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 Tuesday (Aug 25) at 3AM. The primary swell is predicted to be 2.5m and 15s period with a secondary swell of 1.5m and 18s. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Asakawa in the next 16 days are 3.0m 14s and forecast to arrive on Tuesday (Aug 25) at 9AM. Winds are predicted to be cross-onshore at the time the swell arrives.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 3AM (Tue 25th Aug) | 8ft (2.5m) 15s |
| Best Surf | 3AM (Tue 25th Aug) | 8ft (2.5m) 15s |
| Most Powerful | 9AM (Tue 25th Aug) | 10ft (3.0m) 14s |
Table - best surf conditions forecast for Asakawa over the next 16 days.
The Lowdown
Alright, let’s talk about Asakawa.
Look, I’m not gonna sugarcoat it: the next couple of weeks are a real mixed bag for this point break. The first week is pretty grim with messy conditions and winds that are just not playing ball. The real standout, the one you want to circle on your calendar, is Monday the 7th of September. That morning you’ve got a solid 10ft groundswell from the SSE with a nice long 11-second period, and the wind goes glassy. That is a recipe for clean, powerful lines peeling down the point. The wave energy is really pumping (1945), but with that size, this is for experienced surfers only—it’s going to be a handful.
The afternoon holds up too, with 8ft from the SSE and clean cross-offshore winds. Still solid, still for the crew who know what they’re doing.
Before that, we’ve got a long dry spell. The surf that shows up from Tuesday the 25th of August right through to early September is mostly blown out or just too weak. There’s a little window on Saturday the 29th of August morning—tiny 3ft swell and glassy conditions—but it’s barely a ripple. Sunday the 30th is even smaller.
Now, look at Sunday the 6th of September. The swell jumps up to 12ft from the SSE, and the energy is massive (5130), but it’s cross-onshore and messy. That’s a lot of water moving but not the clean, rideable waves you want at a point. The real prize is the next day.
Tuesday the 8th and Wednesday the 9th fade back down to smaller, cleaner but unremarkable surf.
So, your move: wait it out through the first week of slop, and be ready for Monday the 7th. That’s the day Asakawa is going to show its true colours, but it’s not a beginner’s session. The water temp is about average for this time of year, so no surprises there.
This is a point break that’s inconsistent, so a run of poor days is normal here. But when it lines up like it does on the 7th, it’s worth the wait.
Rusty.
Short Range ForecastLight rain (total 2mm), mostly falling on Wed morning. Warm (max 31°C on Tue morning, min 25°C on Mon night). Wind will be generally light. | Days 5-7 Weather SummaryHeavy rain (total 30mm), heaviest during Thu night. Warm (max 30°C on Fri afternoon, min 25°C on Thu night). Wind will be generally light. | ||||||||||||||||||
Tuesday 25 | Wednesday 26 | Thursday 27 | Friday 28 | Saturday 29 | Sunday 30 | ||||||||||||||
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) | SE 16 | SSE 14 | SSE 13 | SSE 13 | S 13 | S 12 | SSW 12 | SSW 11 | S 9 | SSW 9 | S 8 | S 8 | S 7 | S 8 | SSW 8 | SSW 7 | SSW 8 | SE 10 | SSW 8 |
Wave Graph | |||||||||||||||||||
2844 | 3875 | 2005 | 1828 | 1258 | 814 | 521 | 307 | 194 | 282 | 187 | 120 | 47 | 74 | 142 | 86 | 50 | 36 | 39 | |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross-on | on | cross-off | cross-on | cross-on | cross | cross-on | cross-on | cross | cross | cross-on | cross | glassy | cross-on | cross-off | glassy | cross-on | glassy |
High Tide | 3:35AM1.49m | 5:25PM1.60m | 4:20AM1.60m | 5:47PM1.67m | 4:59AM1.70m | 6:08PM1.73m | 5:36AM1.78m | 6:30PM1.78m | 6:12AM1.83m | 6:52PM1.81m | 6:48AM1.84m | 7:14PM1.82m | |||||||
Low Tide | 10:27PM1.07m | 10:31AM0.36m | 10:55PM0.96m | 11:05AM0.27m | 11:22PM0.84m | 11:35AM0.21m | 11:50PM0.72m | 12:05PM0.20m | 00:18AM0.60m | 12:33PM0.23m | 00:48AM0.49m | 1:02PM0.31m | 1:19AM0.40m | ||||||
— | 5:30 | — | — | 5:31 | — | — | 5:31 | — | — | 5:31 | — | — | 5:33 | — | — | 5:33 | — | — | |
6:38 | — | 6:37 | — | — | 6:37 | — | — | 6:35 | — | — | 6:34 | — | — | 6:32 | — | — | 6:30 | — | |
mm | — | — | — | — | 1 | 1 | — | — | — | 9 | 3 | 4 | 1 | 1 | 3 | 4 | 1 | 4 | 3 |
Temp °C | 26 | 31 | 30 | 26 | 31 | 31 | 27 | 30 | 30 | 27 | 28 | 30 | 27 | 30 | 29 | 27 | 30 | 30 | 27 |
Feels °C | 31 | 34 | 33 | 30 | 34 | 34 | 31 | 33 | 32 | 31 | 33 | 34 | 32 | 35 | 34 | 32 | 35 | 35 | 32 |
Swell 1 Height (m) Direction Period (s) | SE 16 | SSE 14 | SSE 13 | SSE 13 | S 13 | S 12 | SSW 12 | SSW 11 | SSW 10 | SSE 9 | S 8 | S 8 | S 7 | S 8 | SSW 8 | SSW 8 | SSW 8 | S 8 | SSW 8 |
2844 | 3875 | 2005 | 1828 | 1258 | 814 | 521 | 307 | 173 | 173 | 187 | 120 | 47 | 74 | 65 | 63 | 50 | 29 | 39 | |
Swell 2 Height (m) Direction Period (s) | SSE 18 | E 15 | S 15 | S 15 | SE 10 | SSE 9 | SSE 9 | SSE 9 | SE 10 | SSW 9 | SW 8 | SW 9 | SSW 8 | SE 9 | SE 7 | SE 11 | SE 10 | SE 10 | SE 10 |
1474 | 17 | 1327 | 636 | 213 | 216 | 186 | 168 | 16 | 71 | 18 | 19 | 35 | 13 | 13 | 19 | 27 | 36 | 17 | |
Swell 3 Height (m) Direction Period (s) | E 11 | S 18 | E 14 | E 13 | E 13 | E 13 | E 12 | SSE 11 | E 11 | E 11 | SE 10 | SW 12 | SSE 9 | SSE 13 | ESE 9 | SSE 7 | ESE 10 | SW 10 | SE 6 |
10 | 942 | 16 | 32 | 30 | 29 | 25 | 12 | 10 | 9 | 15 | 21 | 8 | 17 | 8 | 5 | 9 | 14 | 6 | |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | S 9 | SSW 9 | SW 8 | SW 8 | — | — | SSW 8 | SSW 7 | SW 4 | SSW 2 | SW 3 |
— | — | — | — | — | — | — | — | 194 | 282 | 158 | 102 | — | — | 142 | 86 | 7 | 1 | 2 | |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 2 | 11 | 11 | 0 | 11 | 30 | 2 | 11 | 11 | 2 | 2 | 11 | 2 | 0 | 14 | 0 | 0 | 19 | 1 |
Best forecast wave conditions in Shikoku | |||||||||||||||||||
Best forecast wave conditions in Japan | |||||||||||||||||||
Header Global | |||||||||||||||||||
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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.











