
Surf Forecasts:
Asakawa surf forecast from 17 Jul 2026:
- Best quality surf: Monday 20 Jul, 3AM (local time) - 2ft (0.6m), 9s period, SE swell with glassy winds.
- Most powerful swell: Saturday 25 Jul, 3AM (local time) - 1.5ft (0.4m), 16s period, SE swell with 94 kJ wave energy.
- Next surfable swell (1★+): Monday 20 Jul, 3AM (local time) - 2ft (0.6m), 9s period with SE 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 Monday (Jul 20) at 3AM. The primary swell is predicted to be 0.6m and 9s period with a secondary swell of 0.5m and 9s. Another secondary swell of 0.2m and 9s is also forecast. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Asakawa in the next 16 days are 0.4m 16s and forecast to arrive on Saturday (Jul 25) at 3AM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.2m 7s period and expected on Friday (Jul 24) at 9AM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 3AM (Mon 20th Jul) | 2ft (0.6m) 9s |
| Best Surf | 3AM (Mon 20th Jul) | 2ft (0.6m) 9s |
| Most Powerful | 3AM (Sat 25th Jul) | 1.5ft (0.4m) 16s |
Table - best surf conditions forecast for Asakawa over the next 16 days.
The Lowdown
Right, grab a coffee, and I'll talk you through the next sixteen days for Asakawa. It's a bleak start, not gonna lie. We're looking at a solid week of tiny, weak, and poorly directed waves before something finally shows up. Asakawa is a point break, and it's inconsistent at the best of times, so a blank run like this isn't unusual for the area. The water temperature is about average for the time of year, nothing to report there.
The first few days, from Saturday the 18th through to Thursday the 23rd, are a write-off. We're dealing with ankle-snappers, mostly 1 ft to 1 ft from the ESE, with weak combined energy – the highest in that stretch is just 45 (moderate wave energy). The winds are a mixed bag with some glassy mornings, but the swell just isn't there. You're better off finding a different hobby.
We do get a slight uptick on Friday the 24th of July. The morning sees a glassy 1 ft swell from the SE with a very long period of 18 seconds, and the combined energy hits 85 (moderate wave energy). It's surfable, but very ordinary. The real kicker is that the swell is long-period, which is good for a point break like Asakawa, but it's still tiny. Saturday morning the 25th is a little better, with 1 ft from the SE, a period of 16 seconds, and combined energy of 152 (moderate wave energy). Still glassy. These are the best of a very poor bunch, but I wouldn't be rushing out.
From Sunday the 26th, the swell starts to build but the wind turns cross-onshore, trashing the quality. We get 2 ft on Sunday, then 3 ft on Monday morning the 27th, with energy jumping to 323 (moderate wave energy). The real action starts on Monday afternoon the 27th, as the swell jumps to 6 ft from the SE with a period of 13 seconds and combined energy of 975 (strong wave energy). The wind is onshore, but the size is coming.
Tuesday the 28th of July is the first real standout. Tuesday morning, we're looking at a 7 ft swell from the SE with a period of 12 seconds. The combined energy hits 1754 (strong wave energy). The wind is a light cross-onshore, but at 7 ft, it's getting serious. That's going to be big and powerful at Asakawa. It's a point break, so the long-period groundswell will wrap in nicely, but it's getting heavy. This is getting into expert territory for the bigger sets.
Wednesday the 29th of July is the biggest day of the period. The morning has a 10 ft swell from the SSE, period of 14 seconds, and combined energy of 3678 (very strong wave energy). The afternoon sees 12 ft from the same direction with energy of 4815 (very strong wave energy). This is massive. The wind is a light cross-onshore, but the size is the story. This is strictly for experts only. The point break will handle the size, but it's going to be a beast.
From Thursday the 30th of July, the wind picks up to a moderate cross-onshore, and the swell drops slightly but remains huge – 13 ft on Thursday with energy over 8000 (very strong wave energy). The quality is poor due to the wind and rain. Friday the 31st of July is the best of the big swell run. The morning shows a 16 ft swell from the S with a period of 15 seconds and a massive combined energy of 10788 (very strong wave energy). The wind is a gentle cross-onshore, which is actually manageable. The afternoon is similar, 15 ft from the S with 9505 energy. This is a full-on, solid, powerful groundswell for the point. It's a standout for size and power, but again, only for the brave.
Saturday the 1st of August sees the wind turning nasty, with a fresh cross-shore breeze and the swell dropping to 13 ft from the S. The energy is still massive but the conditions are messy. By Sunday the 2nd, it's a grim, windy, rainy mess, with the swell dropping to 12 ft from the SSW. That's a wrap.
So, to be brutally honest, if you're looking for clean, fun waves, you're out of luck. The best bet is Monday the 27th through Wednesday the 29th of July for the biggest, most powerful swell, but it's not for the faint-hearted. If you're a competent surfer on a big-wave gun, Friday the 31st of July morning is the pick of the bunch for the sheer size and energy. For everyone else, maybe take up golf.
Rusty.
Short Range ForecastLight rain (total 8mm), mostly falling on Fri night. Warm (max 30°C on Sat morning, min 26°C on Sat night). Wind will be generally light. | Days 5-7 Weather SummaryModerate rain (total 14mm), heaviest on Tue morning. Warm (max 31°C on Wed morning, min 27°C on Mon night). Wind will be generally light. | ||||||||||||||||||
Saturday 18 | Sunday 19 | Monday 20 | Tuesday 21 | Wednesday 22 | Thursday 23 | ||||||||||||||
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 10 | ESE 9 | E 9 | SE 8 | ESE 9 | ESE 9 | SE 9 | SE 7 | SE 7 | ESE 11 | ESE 11 | ESE 11 | ESE 11 | ESE 11 | ESE 10 | SE 11 | SE 9 | SE 10 | SE 18 |
Wave Graph | |||||||||||||||||||
16 | 15 | 13 | 24 | 17 | 17 | 41 | 14 | 14 | 47 | 23 | 23 | 22 | 11 | 11 | 18 | 15 | 25 | 50 | |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | glassy | on | on | cross-on | glassy | on | cross | cross-on | cross-on | glassy | glassy | cross-on | cross-off | glassy | cross-on | cross-off | glassy | cross-on | cross |
High Tide | 8:04AM1.75m | 9:08PM1.72m | 8:52AM1.63m | 9:39PM1.67m | 9:44AM1.49m | 10:10PM1.62m | 10:46AM1.35m | 10:42PM1.56m | 12:10PM1.25m | 11:21PM1.50m | 2:11PM1.24m | 00:16AM1.45m | |||||||
Low Tide | 2:18AM0.73m | 2:36PM0.26m | 3:02AM0.69m | 3:11PM0.45m | 3:49AM0.67m | 3:45PM0.65m | 4:40AM0.66m | 4:20PM0.84m | 5:41AM0.66m | 5:01PM1.01m | 6:53AM0.64m | 6:12PM1.14m | |||||||
— | 5:03 | — | — | 5:05 | — | — | 5:05 | — | — | 5:05 | — | — | 5:07 | — | — | 5:07 | — | — | |
7:12 | — | 7:12 | — | — | 7:12 | — | — | 7:10 | — | — | 7:09 | — | — | 7:09 | — | — | 7:08 | — | |
mm | 3 | — | 2 | 1 | — | — | — | — | 2 | — | 3 | 6 | 1 | — | 2 | 1 | — | 1 | 1 |
Temp °C | 27 | 30 | 29 | 27 | 30 | 29 | 27 | 30 | 30 | 27 | 29 | 30 | 28 | 31 | 31 | 28 | 31 | 31 | 28 |
Feels °C | 32 | 34 | 33 | 33 | 34 | 33 | 32 | 34 | 35 | 32 | 35 | 35 | 34 | 35 | 36 | 33 | 35 | 36 | 34 |
Swell 1 Height (m) Direction Period (s) | SE 10 | ESE 9 | SE 8 | SE 8 | ESE 5 | SE 4 | SE 9 | SE 7 | SE 7 | ESE 11 | ESE 11 | ESE 11 | ESE 11 | ESE 11 | ESE 10 | SE 11 | SE 9 | SE 10 | SE 10 |
14 | 15 | 11 | 24 | 9 | 5 | 41 | 14 | 14 | 47 | 23 | 23 | 22 | 11 | 11 | 18 | 14 | 25 | 25 | |
Swell 2 Height (m) Direction Period (s) | ESE 9 | SE 9 | E 9 | ESE 3 | ESE 9 | ESE 9 | SSE 9 | SSE 9 | SSE 8 | SSE 8 | SSE 8 | SSE 8 | SSW 3 | SSE 8 | SSE 8 | ESE 10 | ESE 10 | SE 19 | SE 18 |
16 | 13 | 13 | 1 | 17 | 17 | 8 | 7 | 7 | 7 | 7 | 6 | 1 | 6 | 6 | 11 | 10 | 15 | 50 | |
Swell 3 Height (m) Direction Period (s) | SSW 7 | SSW 7 | SSW 6 | E 9 | SE 8 | SE 8 | ESE 12 | S 3 | ESE 11 | SW 8 | ESE 7 | ESE 6 | SSE 8 | ESE 6 | SE 6 | S 8 | SE 20 | S 8 | SSE 8 |
11 | 4 | 4 | 7 | 10 | 9 | 14 | 1 | 12 | 3 | 4 | 4 | 6 | 4 | 1 | 1 | 15 | 5 | 7 | |
Wind waves Height (m) Direction Period (s) | ESE 3 | ESE 3 | ESE 3 | — | — | SE 4 | SW 5 | — | S 3 | SSW 3 | — | — | SW 3 | — | — | — | — | — | SW 2 |
1 | 1 | 2 | — | — | 6 | 1 | — | 2 | 2 | — | — | 3 | — | — | — | — | — | 1 | |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 6 | 64 | 475 | 64 | 30 | 30 | 2 | 30 | 30 | 1 | 30 | 30 | 30 | 64 | 433 | 289 | 289 | 459 | 2 |
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.










