
Surf Forecasts:
Asakawa surf forecast from 30 Jul 2026:
- Best quality surf: Wednesday 5 Aug, 6PM (local time) - 18ft (5.5m), 18s period, SE swell with cross-onshore winds.
- Most powerful swell: Thursday 6 Aug, 3PM (local time) - 26ft (8.0m), 18s period, SE swell with 41,040 kJ wave energy.
- Next surfable swell (1★+): Saturday 1 Aug, 6PM (local time) - 1.5ft (0.4m), 11s 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 Saturday (Aug 01) at 6PM. The primary swell is predicted to be 0.2m and 18s period with a secondary swell of 0.4m and 11s. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Asakawa in the next 16 days are 8.0m 18s and forecast to arrive on Thursday (Aug 06) at 3PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.6m 3s period and expected on Sunday (Aug 02) at 12PM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 6PM (Sat 1st Aug) | 1.5ft (0.4m) 11s |
| Best Surf | 6PM (Wed 5th Aug) | 18ft (5.5m) 18s |
| Most Powerful | 3PM (Thu 6th Aug) | 26ft (8.0m) 18s |
Table - best surf conditions forecast for Asakawa over the next 16 days.
The Lowdown
Alright, let me have a look at what's cookin' over the next couple of weeks. We've got one spot to focus on here, so let's get into it.
Right now, there's not a lot happening. The first few days are pretty flat and not worth paddling out for. You're looking at tiny little knee-high dribbles with weak energy and next to no push. Hold your horses, because the waiting game starts now.
Things start to turn the corner on Sunday the 2nd of August. A solid pulse of groundswell is forecast to fill in from the ESE with a very long period of 18 seconds. Early morning sees chest to head-high waves (4 ft) but the real story is the afternoon – that swell jumps up a bit. The combined wave energy is solid at 626 (moderate energy) and the wind is light cross-off from the NE, meaning the face is gonna be clean as a whistle. It won't be huge, but the quality should be there at Asakawa point break. Keep an eye on the crowds as this spot can get busy sometimes.
The standout of the whole outlook is shaping up to be Wednesday the 5th of August. We're talking a proper big swell event here. The morning is looking at 15 ft SE groundswell with a 17-second period. The energy is through the roof at 10814 (strong wave energy), and with light cross-shore winds from the ENE, the lineup should be holding good shape. This is expert-level stuff though, way too big for anyone without serious experience. If you've got the skills and the right board, this is the session to circle. The afternoon gets even bigger, up to 18 ft, but the wind flicks more cross-on, so the early morning window is the pick.
Thursday the 6th of August gets absolutely thumping. Swell hits 26 ft from the SE with a monster 18-second period. Wave energy is pumping at 38323 (very strong wave energy). But the problem is, it's just too big for this spot. Even though the wind is cross-shore, that kind of size will be closing out and dangerous. This is strictly for the elite few who know the break intimately.
After that big pulse, energy drops through the second week. By the weekend of the 8th and 9th of August, the swell hangs around in the 5 ft to 7 ft range but the wind is mostly cross-on or onshore, and morning thunderstorms are possible. Some fun waves might pop up if you're desperate, but it won't be anything special. The period drops short on the 9th, turning the waves into mushy, less powerful lines.
The last week of the outlook is pretty quiet. Swell fades and winds stay onshore or cross-on, making for mostly poor conditions. The final days see the swell dropping below 3 ft again. Not much to write home about.
Overall, the clear highlight is Wednesday morning August 5th for the big wave crew, with Sunday August 2nd afternoon being the best bet for the intermediate surfer looking for clean, fun-sized waves.
Stay stoked.
Rusty
Short Range ForecastMostly dry. Warm (max 33°C on Thu morning, min 27°C on Thu night). Wind will be generally light. | Days 4-6 Weather SummaryLight rain (total 5mm), mostly falling on Tue morning. Warm (max 34°C on Sun morning, min 26°C on Tue night). Wind will be generally light. | ||||||||||||||||||||
Thursday 30 | Friday 31 | Saturday 1 | Sunday 2 | Monday 3 | Tuesday 4 | Wednesday 5 | |||||||||||||||
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 10 | SE 10 | SE 10 | SE 9 | SE 13 | SE 10 | SE 10 | SE 11 | SE 16 | ESE 18 | ESE 16 | ESE 15 | ESE 16 | ESE 17 | ESE 18 | ESE 17 | ESE 17 | ESE 17 | SE 17 | SE 18 | SE 18 |
Wave Graph | |||||||||||||||||||||
23 | 23 | 23 | 24 | 26 | 23 | 28 | 29 | 64 | 174 | 612 | 776 | 1608 | 2251 | 3777 | 4358 | 5406 | 8772 | 10814 | 17650 | 28080 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | on | glassy | glassy | on | glassy | glassy | cross-on | cross-off | cross-off | cross-off | cross-off | cross | on | cross-on | cross-on | cross-on | glassy | cross | cross-on | cross-off |
High Tide | 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 | 9:03AM1.58m | 9:19PM1.69m | 9:59AM1.47m | 9:52PM1.64m | ||||||||
Low Tide | 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 | 3:01AM0.57m | 3:03PM0.60m | 3:47AM0.54m | 3:40PM0.78m | ||||||||
5:11 | — | — | 5:13 | — | — | 5:13 | — | — | 5:13 | — | — | 5:15 | — | — | 5:16 | — | — | 5:16 | — | — | |
— | 7:04 | — | — | 7:04 | — | — | 7:02 | — | — | 7:01 | — | — | 7:00 | — | — | 7:00 | — | — | 6:59 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 2 | 2 | 1 | — | — | — |
Temp °C | 33 | 32 | 29 | 33 | 32 | 29 | 33 | 32 | 29 | 34 | 34 | 30 | 31 | 31 | 27 | 29 | 29 | 27 | 30 | 31 | 27 |
Feels °C | 36 | 36 | 33 | 36 | 36 | 34 | 36 | 35 | 32 | 37 | 37 | 35 | 35 | 35 | 33 | 34 | 34 | 32 | 33 | 34 | 31 |
Swell 1 Height (m) Direction Period (s) | SE 10 | SE 10 | SE 10 | SE 9 | SE 9 | SE 10 | SE 10 | SE 11 | SE 11 | ESE 18 | ESE 16 | ESE 15 | ESE 16 | ESE 17 | ESE 18 | ESE 17 | ESE 17 | ESE 17 | SE 17 | SE 18 | SE 18 |
23 | 23 | 23 | 23 | 23 | 23 | 28 | 29 | 41 | 174 | 612 | 776 | 1608 | 2251 | 3777 | 4358 | 5406 | 8772 | 10814 | 17650 | 28080 | |
Swell 2 Height (m) Direction Period (s) | SSW 5 | SSW 8 | SSW 5 | SSW 5 | SSW 4 | SE 11 | SSW 4 | ESE 17 | SE 16 | ESE 14 | SSW 8 | SE 10 | SE 13 | SSE 10 | ESE 6 | — | — | — | — | — | — |
4 | 6 | 5 | 4 | 2 | 20 | 2 | 28 | 64 | 120 | 7 | 15 | 7 | 18 | 49 | — | — | — | — | — | — | |
Swell 3 Height (m) Direction Period (s) | SSW 8 | SSW 4 | SSW 7 | SE 12 | SE 13 | SSW 5 | S 7 | S 4 | ESE 19 | SE 9 | SSW 8 | S 8 | SE 13 | SE 13 | — | — | — | — | — | — | — |
6 | 2 | 5 | 24 | 26 | 3 | 1 | 1 | 35 | 21 | 7 | 5 | 7 | 7 | — | — | — | — | — | — | — | |
Wind waves Height (m) Direction Period (s) | — | SW 6 | — | — | — | — | — | ENE 3 | SW 5 | E 9 | NE 4 | — | — | ESE 5 | E 6 | ESE 5 | ESE 6 | — | — | — | — |
— | 13 | — | — | — | — | — | 1 | 3 | 60 | 6 | — | — | 37 | 64 | 32 | 46 | — | — | — | — | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 43 | 30 | 293 | 2 | 22 | 6 | 553 | 2 | 0 | 0 | 0 | 0 | 22 | 385 | 19 | 19 | 19 | 0 | 43 | 459 | 57 |
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.










