
Surf Forecasts:
Asakawa surf forecast from 7 Jul 2026:
- Best quality surf: Saturday 11 Jul, 12AM (local time) - 13ft (4.0m), 17s period, S swell with glassy winds.
- Most powerful swell: Saturday 11 Jul, 3AM (local time) - 13ft (4.0m), 17s period, S swell with 9,647 kJ wave energy.
- Next surfable swell (1★+): Wednesday 8 Jul, 3AM (local time) - 7ft (2.2m), 16s 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 Wednesday (Jul 08) at 3AM. The primary swell is predicted to be 2.2m and 16s period. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Asakawa in the next 16 days are 4.0m 17s and forecast to arrive on Saturday (Jul 11) at 3AM. Winds are predicted to be glassy at the time the swell arrives.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 3AM (Wed 8th Jul) | 7ft (2.2m) 16s |
| Best Surf | 12AM (Sat 11th Jul) | 13ft (4.0m) 17s |
| Most Powerful | 3AM (Sat 11th Jul) | 13ft (4.0m) 17s |
Table - best surf conditions forecast for Asakawa over the next 16 days.
Updates in hr min s Forecast update imminent
Alright, let's get into it.
Things are about to get real interesting around here, but you’re gonna have to wait a couple of days for the magic to start. The beginning of the week is a bit of a letdown, with only marginal, questionable conditions, but I can already see the pulse of a solid swell building.
On Wednesday afternoon, July 8th, we start to see a pulse of energy from the SSE, with a 7 ft swell running on a 16-second period. That’s a proper groundswell, and while the wind is light and onshore at 6 mph, the energy is already strong (combined energy of 3231). It’s not perfect yet, but it's a sign of things to come.
The real standout window is from Friday afternoon, July 10th through Saturday, July 11th. The swell peaks on Friday afternoon at 12 ft from the S with a 16-second period. The combined energy rockets up to 9124 – that’s a serious amount of power, very strong. The wind holds light and onshore at 6 mph, which is a little frustrating, but the wave quality will be there at Asakawa (a point break). Keep in mind, this swell is big – over 8 ft – so this is for experienced surfers only. On Saturday morning, it’s holding at a solid 13 ft from the S, with a 17-second period and energy of 9002, still with light onshore winds. This is the peak size, but it’s big and powerful.
There’s a bit of a drop-off and the wind turns cross-onshore by Saturday afternoon, so that window Friday afternoon through Saturday morning is your best bet. After that, the swell eases through the rest of the weekend, but the wind stays a bit scratchy.
Then, hold on. On Monday morning, July 13th, things go glassy. The swell has backed right down to 5 ft from the SSW, but the wind is glassy calm. Even though the energy is lower (557), the conditions will be beautiful for a longboard or a fun board. That’s a dawny you won't want to miss.
After that, we go through a long, flat spell. From the 14th onward, the swell drops right out, with a lot of days of 1 ft to 2 ft with very low energy. It’s a quiet run through the second week, though there might be a tiny, clean window on Wednesday morning, July 15th, with 4 ft from the SE and glassy conditions, but it won't have much punch.
So to wrap it up: your standout is definitely the Friday afternoon, July 10th through Saturday morning, July 11th window, where the south groundswell is maxed out. It’s big, powerful, and for experts only. For a more mellow, clean session, aim for the glassy Monday morning of July 13th.
- Rusty
Short Range ForecastLight rain (total 2mm), mostly falling on Fri morning. Warm (max 27°C on Thu morning, min 23°C on Tue night). Wind will be generally light. | Days 5-7 Weather SummaryLight rain (total 3mm), mostly falling on Sun afternoon. Warm (max 30°C on Mon morning, min 24°C on Fri night). Wind will be generally light. | ||||||||||||||||||||
Wednesday 8 | Thursday 9 | Friday 10 | Saturday 11 | Sunday 12 | Monday 13 | Tue 14 | |||||||||||||||
Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | |
Swell Height Map | |||||||||||||||||||||
Wave Height (m) Direction Period (s) | SE 16 | SE 15 | SE 16 | SSE 15 | SSE 15 | SSE 15 | SSE 16 | S 16 | S 17 | S 17 | S 17 | SSW 17 | SSW 16 | SSW 16 | SSW 14 | S 12 | S 10 | SSW 11 | SSW 11 | SSW 10 | SE 12 |
Wave Graph | |||||||||||||||||||||
1494 | 1882 | 2314 | 3156 | 3009 | 3513 | 4819 | 4132 | 8721 | 9483 | 8460 | 8120 | 6381 | 3246 | 1750 | 555 | 225 | 370 | 292 | 163 | 187 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | on | on | on | glassy | cross-on | on | glassy | cross-on | on | glassy | on | on | cross | glassy | on | cross-off | glassy | on | cross-off | glassy | on |
High Tide | 10:55PM1.60m | 11:38AM1.36m | 11:41PM1.58m | 1:20PM1.35m | 00:36AM1.58m | 3:00PM1.43m | 1:41AM1.60m | 4:18PM1.55m | 2:47AM1.65m | 5:16PM1.67m | 3:49AM1.73m | 6:04PM1.75m | 4:46AM1.81m | ||||||||
Low Tide | 5:30AM0.68m | 5:17PM0.83m | 6:40AM0.57m | 6:30PM0.98m | 7:54AM0.44m | 8:00PM1.08m | 9:03AM0.28m | 9:23PM1.10m | 10:04AM0.12m | 10:28PM1.08m | 10:59AM-0.01m | 11:22PM1.02m | 11:49AM-0.08m | ||||||||
— | 4:58 | — | — | 4:58 | — | — | 4:58 | — | — | 5:00 | — | — | 5:00 | — | — | 5:01 | — | — | 5:01 | — | |
7:15 | — | 7:15 | — | — | 7:15 | — | — | 7:15 | — | — | 7:15 | — | — | 7:14 | — | — | 7:14 | — | — | 7:14 | |
mm | — | — | — | — | — | — | — | 1 | 1 | — | — | — | — | — | 3 | — | — | — | 1 | — | — |
Temp °C | 23 | 25 | 26 | 23 | 27 | 27 | 24 | 27 | 26 | 25 | 27 | 27 | 25 | 29 | 28 | 26 | 30 | 30 | 27 | 32 | 32 |
Feels °C | 26 | 28 | 29 | 27 | 29 | 29 | 29 | 30 | 29 | 30 | 30 | 31 | 30 | 32 | 33 | 31 | 35 | 35 | 32 | 36 | 37 |
Swell 1 Height (m) Direction Period (s) | SE 16 | SE 15 | SE 16 | SSE 15 | SSE 15 | SSE 15 | SSE 16 | S 16 | S 17 | S 17 | S 17 | SSW 17 | SSW 16 | SSW 16 | SSW 14 | S 12 | S 10 | SSW 11 | SSW 11 | SSW 10 | SSW 10 |
1494 | 1882 | 2314 | 3156 | 3009 | 3513 | 4819 | 4132 | 8721 | 9483 | 8460 | 8120 | 6381 | 3246 | 1750 | 555 | 225 | 370 | 292 | 163 | 128 | |
Swell 2 Height (m) Direction Period (s) | ESE 7 | SSE 18 | SSE 18 | — | S 19 | — | S 20 | S 18 | SSW 21 | — | — | — | — | SE 15 | SE 10 | SW 13 | SSW 12 | SE 10 | ESE 9 | SE 13 | SE 12 |
99 | 803 | 917 | — | 475 | — | 1294 | 2084 | 2162 | — | — | — | — | 8 | 50 | 261 | 180 | 17 | 26 | 82 | 187 | |
Swell 3 Height (m) Direction Period (s) | SSE 20 | — | — | — | E 8 | — | E 8 | — | — | — | — | — | — | — | — | SE 11 | SE 11 | ESE 9 | SE 12 | ESE 9 | ESE 8 |
275 | — | — | — | 4 | — | 35 | — | — | — | — | — | — | — | — | 40 | 18 | 16 | 23 | 26 | 40 | |
Wind waves Height (m) Direction Period (s) | E 7 | — | — | E 5 | — | E 8 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
203 | — | — | 17 | — | 82 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 11 | 0 | 19 | 11 | 0 | 19 | 11 | 0 | 19 | 11 | 11 | 11 | 2 | 2 | 19 | 14 | 0 | 0 | 0 | 0 | 41 |
Best forecast wave conditions in Shikoku | |||||||||||||||||||||
Best forecast wave conditions in Japan | |||||||||||||||||||||
Header Global | |||||||||||||||||||||
- Map Icons:
Break
Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)
Wind Speed (km/h)
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.











