Surf Forecasts:
Asakawa surf forecast from 28 Jul 2026:
- Best quality surf: Tuesday 4 Aug, 6AM (local time) - 8ft (2.5m), 18s period, ESE swell with glassy winds.
- Most powerful swell: Tuesday 4 Aug, 9PM (local time) - 11ft (3.5m), 18s period, ESE swell with 8,754 kJ wave energy.
- Next surfable swell (1★+): Tuesday 28 Jul, 9PM (local time) - 4.5ft (1.3m), 6s period with SW 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 (Jul 28) at 9PM. The primary swell is predicted to be 1.3m and 6s period with a secondary swell of 0.9m and 6s. Another secondary swell of 0.5m and 10s is also forecast. The wind is predicted to be offshore as the swell arrives.
The most powerful waves expected at Asakawa in the next 16 days are 3.5m 18s and forecast to arrive on Tuesday (Aug 04) at 9PM. Winds are predicted to be onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.4m 3s period and expected on Friday (Jul 31) at 6AM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 9PM (Tue 28th Jul) | 4.5ft (1.3m) 6s |
| Best Surf | 6AM (Tue 4th Aug) | 8ft (2.5m) 18s |
| Most Powerful | 9PM (Tue 4th Aug) | 11ft (3.5m) 18s |
Table - best surf conditions forecast for Asakawa over the next 16 days.
The Lowdown
Alright, let’s talk Asakawa in feet and all that.
Right now, the surf is dead flat. From Tuesday afternoon the 28th of July through Saturday morning the 1st of August, we’re looking at waves around 1ft to 2ft from the SE. Winds are glassy sometimes, but there’s just no swell. A real dry spell.
Sunday the 2nd of August, a little bump shows up. 2ft from the ESE, 14-second period, combined energy at 148 (moderate). Surfable but very ordinary. By the afternoon, it’s 3ft, 16-second period, energy at 373. Still nothing special.
Monday the 3rd of August, swell jumps to 6ft from the ESE in the morning, 16-second period, energy at 1415 (strong). Wind is onshore, so it’s messy. Afternoon gets to 7ft, same direction, still onshore. This is for experienced surfers only.
Now, the standout: Tuesday the 4th of August, morning. 8ft from the ESE, 18-second period, glassy. Energy is 4475 (very strong). This is excellent surf for experienced surfers. Water temperature is 83°F, about average for the time of year.
Wednesday the 5th of August, morning: 16ft from the ESE, 18-second period, glassy. Energy is 15959 (very strong). This is exceptional, but only for expert surfers. Afternoon gets to 20ft, but wind goes cross-onshore. That morning session is the best of the whole forecast.
Then it gets huge and messy. Thursday the 6th of August through the end of the week, we’re seeing 23ft to 31ft swells, but winds are 15 to 28 mph, mostly cross or cross-off. Energy is in the tens of thousands, but it’s a total washing machine. Better for kite surfing than paddle surfing.
The weekend of the 8th and 9th of August drops to 8ft to 15ft, but the wind is still strong and onshore. Poor conditions. The following week, from the 10th to the 12th of August, swell drops to around 6ft, with periods shortening to 7-8 seconds. Winds are light, sometimes glassy, but it’s just marginal, ordinary surf.
Best bet: Wednesday morning the 5th of August. 16ft, glassy, exceptional energy. Only for experts. Tuesday morning the 4th of August is a close second with 8ft and glassy conditions. The rest is either too small, too big, or too windy.
Rusty.
Short Range ForecastLight rain (total 2mm), mostly falling on Wed morning. Warm (max 33°C on Tue afternoon, min 27°C on Wed night). Wind will be generally light. | Days 5-7 Weather SummaryMostly dry. Warm (max 33°C on Sat morning, min 27°C on Fri night). Wind will be generally light. | |||||||||||||||||||
Tue 28 | Wednesday 29 | Thursday 30 | Friday 31 | Saturday 1 | Sunday 2 | Monday 3 | ||||||||||||||
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) | SSW 8 | SE 10 | SE 10 | SW 6 | SE 10 | SE 10 | SE 10 | SE 10 | SE 9 | SE 9 | SE 11 | SE 10 | SE 11 | SE 15 | ESE 14 | ESE 16 | ESE 16 | ESE 16 | ESE 17 | ESE 17 |
Wave Graph  | ||||||||||||||||||||
 kJ | 99 | 48 | 48 | 48 | 47 | 23 | 23 | 23 | 24 | 23 | 20 | 28 | 29 | 57 | 120 | 353 | 688 | 1393 | 2404 | 3212 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | off | glassy | glassy | glassy | glassy | cross-on | off | glassy | glassy | cross-off | glassy | on | cross-off | glassy | on | glassy | on | on | glassy |
High Tide | 6:20PM1.64m | 5:10AM1.68m | 6:46PM1.68m | 5:48AM1.74m | 7:11PM1.71m | 6:24AM1.77m | 7:36PM1.73m | 7:00AM1.77m | 8:00PM1.74m | 7:37AM1.73m | 8:25PM1.74m | 8:17AM1.67m | 8:51PM1.72m | |||||||
Low Tide | 11:43PM0.96m | 12:00PM0.17m | 00:13AM0.89m | 12:32PM0.15m | 00:44AM0.81m | 1:02PM0.16m | 1:15AM0.74m | 1:31PM0.21m | 1:47AM0.67m | 2:00PM0.31m | 2:22AM0.61m | 2:31PM0.44m | ||||||||
 |  |  |  | | | |  | | | | | | | | | | | | | |
 | — | — | 5:11 | — | — | 5:11 | — | — | 5:13 | — | — | 5:13 | — | — | 5:13 | — | — | 5:15 | — | — |
 | 7:06 | — | — | 7:05 | — | — | 7:04 | — | — | 7:04 | — | — | 7:02 | — | — | 7:01 | — | — | 7:00 | — |
mm | — | — | 2 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 1 | — |
Temp °C | 33 | 29 | 32 | 31 | 29 | 32 | 32 | 29 | 33 | 32 | 29 | 33 | 32 | 29 | 32 | 32 | 29 | 32 | 30 | 27 |
Feels °C | 37 | 33 | 37 | 35 | 34 | 35 | 35 | 33 | 36 | 36 | 33 | 36 | 35 | 34 | 35 | 37 | 34 | 36 | 34 | 33 |
Swell 1 Height (m) Direction Period (s) | SE 10 | SSW 6 | SSW 6 | SSW 8 | SE 10 | SE 10 | SE 10 | SSW 5 | SE 9 | SE 9 | SE 10 | SE 10 | SE 11 | SE 15 | ESE 14 | ESE 16 | ESE 16 | ESE 16 | ESE 17 | ESE 17 |
| kJ | 49 | 45 | 17 | 35 | 47 | 23 | 23 | 11 | 23 | 23 | 14 | 28 | 29 | 57 | 120 | 353 | 688 | 1393 | 2404 | 3212 |
Swell 2 Height (m) Direction Period (s) | SE 13 | SE 10 | SE 10 | SE 10 | SSW 5 | SSW 8 | SSW 8 | SE 10 | SSW 5 | NE 3 | SE 11 | SSW 4 | S 7 | SE 11 | SE 9 | SE 10 | SE 10 | ESE 5 | S 8 | ESE 5 |
| kJ | 28 | 48 | 48 | 48 | 10 | 19 | 11 | 23 | 4 | 2 | 20 | 2 | 4 | 18 | 19 | 16 | 15 | 17 | 5 | 36 |
Swell 3 Height (m) Direction Period (s) | E 16 | SE 13 | SSW 8 | SE 13 | SSW 7 | SE 14 | SE 12 | S 7 | SE 12 | SE 13 | SSW 5 | S 7 | ESE 15 | ESE 9 | SSE 9 | SE 7 | S 8 | S 8 | E 15 | — |
| kJ | 5 | 27 | 21 | 26 | 11 | 8 | 6 | 4 | 24 | 6 | 3 | 1 | 22 | 8 | 9 | 2 | 5 | 5 | 40 | — |
Wind waves Height (m) Direction Period (s) | SSW 8 | — | — | SW 6 | — | — | SSW 5 | — | NNE 3 | NNE 3 | WSW 2 | — | NNE 3 | — | — | ENE 3 | ESE 4 | — | ESE 6 | ESE 5 |
| kJ | 99 | — | — | 44 | — | — | 4 | — | 1 | 4 | 1 | — | 1 | — | — | 2 | 5 | — | 36 | 49 |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 11 | 0 | 0 | 0 | 0 | 30 | 581 | 43 | 2 | 30 | 575 | 511 | 30 | 0 | 0 | 19 | 0 | 19 | 385 | 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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