Surf Forecasts:
Asakawa surf forecast from 25 Jul 2026:
- Best quality surf: Sunday 26 Jul, 6AM (local time) - 1.5ft (0.4m), 15s period, SE swell with glassy winds.
- Most powerful swell: Sunday 26 Jul, 6AM (local time) - 1.5ft (0.4m), 15s period, SE swell with 80 kJ wave energy.
- Next surfable swell (1★+): Sunday 26 Jul, 6AM (local time) - 1.5ft (0.4m), 15s 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 Sunday (Jul 26) at 6AM. The primary swell is predicted to be 0.4m and 15s period with a secondary swell of 0.5m and 10s. 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 15s and forecast to arrive on Sunday (Jul 26) at 6AM. Winds are predicted to be glassy at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.3m 3s period and expected on Sunday (Jul 26) at 9AM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 6AM (Sun 26th Jul) | 1.5ft (0.4m) 15s |
| Best Surf | 6AM (Sun 26th Jul) | 1.5ft (0.4m) 15s |
| Most Powerful | 6AM (Sun 26th Jul) | 1.5ft (0.4m) 15s |
Table - best surf conditions forecast for Asakawa over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let’s talk about what’s cooking at Asakawa.
Right now, there’s barely a ripple. The first few days are a bit of a write-off with tiny surf and very ordinary conditions. From Sunday the 26th of July right through to the end of the month, we’re looking at waves around 1ft to 2ft with a weak combined energy reading (154 to 106). Not much to get excited about – the wind is light and glassy at times, but the swell just isn’t there. Expect a gap of nearly a week with no real recommendation.
Things start to stir around Monday the 3rd of August. The swell picks up to 4ft from the ESE, with a long period of 16 seconds and combined energy surging to 576 – that’s moderate energy. The wind is light cross-onshore, so it’s a bit messy. By Tuesday the 4th of August, the early morning looks promising: 7ft of ESE swell, period at 17 seconds, and glassy conditions with a light air. That’s a solid groundswell pushing in, and the combined energy is strong at 2563. This is for experienced surfers only – 7ft is above the beginner threshold. The water temperature is about average for the time of year.
The standout of the whole forecast is Wednesday the 5th of August. Early morning, we’ve got 10ft from the ESE, a very long period of 17 seconds, and a clean cross-offshore breeze from the NNE. The combined energy is a massive 4600 – that’s very strong, powerful swell. This is expert territory. Asakawa is a point break, so that long-period groundswell should set up nicely, with longer gaps between sets making paddling easier. The wind is offshore and clean, so the waves will be well-shaped. This is the best on offer, hands down. It’s a week away, so keep an eye on the forecasts, but it’s looking like a cracking day.
The swell stays big through the 6th, 7th, and 8th of August, with heights up to 15ft and combined energy above 8000 – that’s very strong to extreme. The wind shifts more onshore or cross in the afternoons, so mornings are the pick. By late on the 9th and into the 10th, the swell drops back down to 4ft and then 1ft, and the energy fades away. The run of good surf is over.
If you’re an experienced surfer, point your board at Asakawa for the morning of the 5th of August. That’s the one.
Rusty.
Short Range ForecastLight rain (total 9mm), mostly falling on Mon afternoon. Warm (max 33°C on Sun morning, min 27°C on Mon night). Wind will be generally light. | Days 4-6 Weather SummarySome drizzle, heaviest during Wed afternoon. Warm (max 33°C on Fri morning, min 27°C on Wed night). Wind will be generally light. | ||||||||||||||||||||
Sunday 26 | Monday 27 | Tuesday 28 | Wednesday 29 | Thursday 30 | Friday 31 | Saturday 1 | |||||||||||||||
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) | SE 15 | SE 15 | SE 14 | SE 14 | SE 14 | SE 14 | ESE 10 | SE 10 | SE 10 | SE 10 | SE 10 | SE 10 | SE 10 | SE 10 | SE 9 | SE 9 | SE 9 | SE 10 | SE 10 | SE 11 | SE 11 |
Wave Graph  | |||||||||||||||||||||
 kJ | 78 | 76 | 74 | 72 | 70 | 65 | 67 | 49 | 48 | 48 | 48 | 47 | 23 | 23 | 23 | 23 | 23 | 23 | 38 | 40 | 30 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | glassy | glassy | cross-off | glassy | on | cross-off | glassy | on | off | glassy | glassy | off | glassy | on | cross | glassy | on | glassy | cross | cross-on | off |
High Tide | 5:23PM1.50m | 3:43AM1.52m | 5:52PM1.58m | 4:30AM1.60m | 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 | ||||||||
Low Tide | 10:08AM0.41m | 10:33PM1.11m | 10:50AM0.32m | 11:10PM1.04m | 11:27AM0.23m | 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 | |||||||
 |  |  | | | |  | |  | | |  | | | | | | | | | | |
 | 5:09 | — | — | 5:09 | — | — | 5:11 | — | — | 5:11 | — | — | 5:11 | — | — | 5:13 | — | — | 5:13 | — | — |
 | — | 7:07 | — | — | 7:07 | — | — | 7:06 | — | — | 7:05 | — | — | 7:04 | — | — | 7:04 | — | — | 7:02 | — |
mm | — | 2 | — | — | 3 | — | — | 3 | 1 | — | 1 | — | — | — | — | — | — | — | — | — | — |
Temp °C | 33 | 31 | 28 | 32 | 31 | 28 | 32 | 32 | 27 | 29 | 32 | 28 | 32 | 32 | 28 | 33 | 33 | 29 | 33 | 33 | 29 |
Feels °C | 37 | 36 | 33 | 36 | 36 | 33 | 36 | 37 | 32 | 34 | 36 | 32 | 36 | 36 | 33 | 37 | 38 | 34 | 36 | 37 | 33 |
Swell 1 Height (m) Direction Period (s) | SE 10 | SE 11 | S 8 | S 8 | S 9 | S 8 | ESE 10 | SE 10 | SSW 8 | SSW 5 | SSW 8 | SSW 5 | SE 10 | SE 10 | SE 9 | SE 9 | SE 9 | SE 10 | SE 10 | SE 11 | SE 11 |
| kJ | 50 | 55 | 50 | 50 | 54 | 51 | 67 | 49 | 38 | 17 | 35 | 15 | 23 | 23 | 23 | 23 | 23 | 23 | 38 | 40 | 30 |
Swell 2 Height (m) Direction Period (s) | SE 15 | S 9 | SE 14 | SE 10 | SE 10 | SE 10 | S 8 | S 8 | SE 10 | SE 10 | SE 10 | SE 10 | SSW 5 | SSW 8 | SSW 7 | SSW 4 | SSW 4 | SE 11 | SSW 4 | S 4 | ESE 9 |
| kJ | 78 | 39 | 74 | 51 | 50 | 50 | 36 | 35 | 48 | 48 | 48 | 47 | 5 | 11 | 11 | 3 | 1 | 20 | 4 | 1 | 8 |
Swell 3 Height (m) Direction Period (s) | S 9 | SE 15 | SE 11 | SE 14 | SE 14 | SE 14 | SE 14 | SE 13 | SE 13 | SSW 8 | SE 13 | SSW 8 | SSW 8 | SE 12 | SE 12 | ESE 12 | SE 13 | S 7 | S 7 | S 7 | S 4 |
| kJ | 26 | 76 | 40 | 72 | 70 | 65 | 29 | 28 | 27 | 21 | 26 | 12 | 6 | 6 | 6 | 15 | 7 | 4 | 1 | 1 | 1 |
Wind waves Height (m) Direction Period (s) | NNE 3 | — | SW 3 | NNE 2 | — | SW 3 | — | SW 4 | SSW 4 | — | SW 5 | — | — | — | SW 5 | — | — | SSW 4 | — | ENE 3 | WSW 2 |
| kJ | 1 | — | 2 | 1 | — | 2 | — | 5 | 12 | — | 23 | — | — | — | 1 | — | — | 3 | — | 1 | 1 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 0 | 0 | 0 | 0 | 11 | 0 | 0 | 11 | 0 | 0 | 0 | 0 | 30 | 30 | 14 | 6 | 30 | 2 | 376 | 459 | 6 |
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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