Surf Forecasts:
Asakawa surf forecast from 8 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 10,011 kJ wave energy.
- Next surfable swell (1★+): Wednesday 8 Jul, 9PM (local time) - 8ft (2.5m), 16s 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 Wednesday (Jul 08) at 9PM. The primary swell is predicted to be 2.5m and 16s period with a secondary swell of 0.6m and 20s. 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+) | 9PM (Wed 8th Jul) | 8ft (2.5m) 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.
Rusty here, givin' you the lowdown on Asakawa. We got a bit of a wait before the waves show up proper. First sniff of a swell is on Wednesday, the 8th of July, but it's gonna be scrappy. The real juice is a big, heavy swell that shows up around the end of the first week and again in the second. Water temp is about 76°, which is a touch cooler than average for summer.
The start of the run (Wed 8th to Sat 11th) sees the swell building from the SSE to S, from about 7ft up to a solid 13ft on Friday and Saturday. The wave energy is pumping up, going from moderate to strong (2685 to 10267). The catch is the wind is light and onshore from the SSE for most of it, so it's gonna be messy. The biggest day here is Friday, July 10th, with a 13ft south swell and a real long 17-second period, with 10267 energy. Light onshore wind keeps it bumpy. Later, Sunday the 12th still has some swell at 7ft, but the energy is fading and there's a chance of thunderstorms. Nothing clean enough to call a standout in this first stretch.
We hit a flat spot from Monday, July 13th to Wednesday, July 15th. Swell drops to a tiny 3ft to 5ft with weak energy (306 to 695). The wind does go glassy on Monday morning, but there's no push behind it. A proper lull.
Now, things get real interesting on Friday, July 17th. A new SSE swell hits at a solid 11ft with a 12-second period and strong energy (5016). The wind turns cross-offshore from the NNE, cleaning the surface right up. The report calls it "excellent surf conditions for experienced surfers." This is powerful, clean surf. The swell holds through the weekend, with Saturday 18th having a clean 5ft from the ESE and Sunday 19th offering a punchy 7-8ft from the same direction. But the big one to circle on your calendar is Monday, July 20th.
Here's the pick: Monday, July 20th is your day. The swell spikes to a massive 13ft from the ESE with a long 16-second period and very strong energy (8972). Wind is light and cross-shore from the ENE, keeping it clean and lined up. This is heavy, long-period groundswell, and Asakawa is a point break, so it'll handle it beautifully. Over 8ft, this is strictly for the experienced crew. The spot can get "sometimes" crowded, so expect some company. Tuesday the 21st is even bigger at 23ft from the SE, but the wind turns cross-onshore and the swell is just too big for the break itself. Monday is your money window.
After that, Wednesday the 22nd settles back to a manageable 7ft from the south with a glassy morning for a nice follow-up session.
Alright, that's the picture. A slow, bumpy start, a flat middle, then a massive, powerful groundswell for the experienced surfers. Stay safe, and I'll see you in the water.
Rusty.
Short Range ForecastMostly dry. Warm (max 28°C on Fri morning, min 23°C on Wed night). Wind will be generally light. | Days 4-6 Weather SummaryLight rain (total 7mm), mostly falling on Sun afternoon. Warm (max 29°C on Mon morning, min 24°C on Sat night). Wind will be generally light. | ||||||||||||||||||||
Wednesday 8 | Thursday 9 | Friday 10 | Saturday 11 | Sunday 12 | Monday 13 | Tuesday 14 | |||||||||||||||
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 16 | SSE 15 | SSE 15 | SSE 15 | SSE 15 | S 16 | S 17 | S 17 | S 17 | SSW 16 | SSW 16 | SSW 16 | SSW 14 | S 12 | SSW 12 | S 11 | S 11 | SSW 10 | SE 13 | SE 13 |
Wave Graph  | |||||||||||||||||||||
 kJ | 1882 | 2314 | 3156 | 3009 | 3288 | 3545 | 6069 | 8183 | 9844 | 8897 | 7740 | 6817 | 3246 | 1700 | 555 | 218 | 351 | 229 | 163 | 380 | 933 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | on | on | glassy | on | on | glassy | on | on | glassy | on | on | glassy | on | on | glassy | glassy | on | glassy | cross | on | cross |
High Tide | 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 | 6:47PM1.80m | ||||||||
Low Tide | 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 | 00:08AM0.95m | ||||||||
 | |  |  | | | | |  |  | | | |  |  | | | | | | | |
 | 4:58 | — | — | 4:58 | — | — | 4:58 | — | — | 5:00 | — | — | 5:00 | — | — | 5:01 | — | — | 5:01 | — | — |
 | — | 7:15 | — | — | 7:15 | — | — | 7:15 | — | — | 7:15 | — | — | 7:14 | — | — | 7:14 | — | — | 7:14 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | 3 | 1 | — | 2 | 1 | — | — | — |
Temp °C | 24 | 25 | 23 | 27 | 27 | 24 | 28 | 28 | 25 | 26 | 26 | 25 | 28 | 28 | 25 | 29 | 28 | 26 | 30 | 29 | 26 |
Feels °C | 27 | 28 | 27 | 30 | 30 | 28 | 31 | 31 | 29 | 30 | 30 | 30 | 31 | 32 | 29 | 33 | 32 | 31 | 33 | 33 | 31 |
Swell 1 Height (m) Direction Period (s) | SE 15 | SE 16 | SSE 15 | SSE 15 | SSE 15 | SSE 15 | S 16 | S 17 | S 17 | S 17 | SSW 16 | SSW 16 | SSW 16 | SSW 14 | S 12 | S 9 | S 11 | S 11 | SSW 10 | SE 13 | SE 13 |
| kJ | 1882 | 2314 | 3156 | 3009 | 3288 | 3545 | 6069 | 8183 | 9844 | 8897 | 7740 | 6817 | 3246 | 1700 | 555 | 159 | 351 | 229 | 163 | 380 | 933 |
Swell 2 Height (m) Direction Period (s) | SSE 18 | SSE 18 | E 8 | S 19 | E 8 | S 18 | — | SSW 21 | — | — | — | — | SE 15 | SE 10 | SW 13 | SSW 12 | SE 10 | ESE 9 | ESE 9 | SSW 10 | SSW 9 |
| kJ | 803 | 917 | 36 | 475 | 46 | 963 | — | 2084 | — | — | — | — | 8 | 52 | 261 | 218 | 17 | 31 | 70 | 128 | 100 |
Swell 3 Height (m) Direction Period (s) | — | — | — | E 8 | — | E 8 | — | — | — | — | — | — | — | — | SE 9 | SE 11 | ESE 9 | SE 15 | SE 12 | ESE 9 | ESE 9 |
| kJ | — | — | — | 4 | — | 49 | — | — | — | — | — | — | — | — | 30 | 18 | 16 | 59 | 73 | 68 | 99 |
Wind waves Height (m) Direction Period (s) | — | — | — | E 8 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | SW 3 |
| kJ | — | — | — | 64 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 6 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 19 | 11 | 0 | 19 | 19 | 0 | 11 | 11 | 0 | 19 | 19 | 0 | 2 | 19 | 0 | 0 | 11 | 0 | 30 | 11 | 2 |
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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