Surf Forecasts:
Asakawa surf forecast from 16 Jul 2026:
- Best quality surf: Friday 17 Jul, 6AM (local time) - 2ft (0.6m), 7s period, SSW swell with offshore winds.
- Most powerful swell: Friday 17 Jul, 6AM (local time) - 2ft (0.6m), 7s period, SSW swell with 37 kJ wave energy.
- Next surfable swell (1★+): Friday 17 Jul, 6AM (local time) - 2ft (0.6m), 7s period with SSW 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 Friday (Jul 17) at 6AM. The primary swell is predicted to be 0.6m and 7s period with a secondary swell of 0.3m and 10s. The wind is predicted to be offshore as the swell arrives.
The most powerful waves expected at Asakawa in the next 16 days are 0.6m 7s and forecast to arrive on Friday (Jul 17) at 6AM. Winds are predicted to be offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.4m 3s period and expected on Wednesday (Jul 22) at 9AM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 6AM (Fri 17th Jul) | 2ft (0.6m) 7s |
| Best Surf | 6AM (Fri 17th Jul) | 2ft (0.6m) 7s |
| Most Powerful | 6AM (Fri 17th Jul) | 2ft (0.6m) 7s |
Table - best surf conditions forecast for Asakawa over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let’s be straight with you about Asakawa. This is a point break that’s usually pretty inconsistent, and looking at the next 16 days, it’s a real mixed bag with a lot of waiting involved.
The first half of the outlook is a tough one. From Thursday the 16th right through to the 26th of July, we’re looking at a long run of tiny, weak surf. The swell energy is mostly in the double digits, like 90 (weak) or even down to 15 (weak) on the 20th. We’re talking waves around 0.7ft to 1ft with periods that are either short or just average. It’s basically a lake for over a week, so don’t bother getting the board wet. There are some glassy mornings on the 17th, 21st, 22nd, and 23rd, but with zero swell to work with, it’s just flat and clean.
Things start to get a little more interesting around the 27th of July. On Monday morning, we see a jump to 5ft from the SE with a period of 12 seconds. The energy climbs to 603 (moderate). It’s a bit of a messy signal though, with cross-onshore winds, so it’s only marginal. The best bet for the whole period, and the only true standout, is the morning of Tuesday the 28th of July. We’ve got 7ft of SSE swell with a 12-second period, and the energy is a solid 1687 (strong). But the real kicker is the wind – it’s glassy, dead calm. This is point break territory, and that long period means it’ll hold up nicely here, offering some proper, clean lines. It’s over 5ft though, so it’s not a beginner day, and at 7ft, it’s going to be a proper session for experienced surfers. The afternoon gets a bit more wind and drops to 8ft, which is getting into expert-only territory.
The Wednesday the 29th still has some size at 7ft and 6ft, but the wind swings cross-shore and then cross-on, so it won’t be as clean as Tuesday morning. The energy stays strong (1206 and 950). By Thursday the 30th, the swell drops back to 4ft and the wind is onshore, so it’s back to being ordinary.
So, to wrap it up: don’t even think about it until the 27th. The one clear, glassy, standout session is the morning of Tuesday the 28th of July. That’s your window. The water temperature is around 81°F, which is pretty normal for this time of year, just a slight positive anomaly.
Rusty.
Short Range ForecastSome drizzle, heaviest during Fri night. Warm (max 31°C on Thu afternoon, min 26°C on Fri night). Wind will be generally light. | Days 5-7 Weather SummaryModerate rain (total 12mm), heaviest on Tue afternoon. Warm (max 31°C on Wed morning, min 26°C on Sun night). Wind will be generally light. | |||||||||||||||||||
Thu 16 | Friday 17 | Saturday 18 | Sunday 19 | Monday 20 | Tuesday 21 | Wednesday 22 | ||||||||||||||
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 | SSW 7 | ESE 10 | SE 10 | SE 10 | ESE 9 | E 9 | SE 8 | ESE 9 | ESE 9 | SE 9 | SSE 9 | ESE 9 | ESE 9 | ESE 11 | ESE 11 | ESE 11 | ESE 11 | SE 12 | SE 11 |
Wave Graph  | ||||||||||||||||||||
 kJ | 56 | 26 | 19 | 18 | 14 | 15 | 13 | 33 | 17 | 17 | 20 | 7 | 16 | 16 | 23 | 23 | 23 | 22 | 24 | 19 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | on | off | glassy | on | glassy | on | on | cross-on | on | on | glassy | on | cross-on | glassy | glassy | cross-on | cross-off | glassy | glassy | glassy |
High Tide | 8:02PM1.79m | 7:16AM1.84m | 8:36PM1.76m | 8:04AM1.75m | 9:08PM1.72m | 8:52AM1.63m | 9:39PM1.67m | 9:44AM1.49m | 10:10PM1.62m | 10:46AM1.35m | 10:42PM1.56m | 12:10PM1.25m | 11:21PM1.50m | |||||||
Low Tide | 1:35AM0.79m | 1:58PM0.09m | 2:18AM0.73m | 2:36PM0.26m | 3:02AM0.69m | 3:11PM0.45m | 3:49AM0.67m | 3:45PM0.65m | 4:40AM0.66m | 4:20PM0.84m | 5:41AM0.66m | 5:01PM1.01m | ||||||||
 |  |  | |  | | | | | | | |  |  | | | | | | | |
 | — | — | 5:03 | — | — | 5:03 | — | — | 5:05 | — | — | 5:05 | — | — | 5:05 | — | — | 5:07 | — | — |
 | 7:13 | — | — | 7:12 | — | — | 7:12 | — | — | 7:12 | — | — | 7:10 | — | — | 7:09 | — | — | 7:09 | — |
mm | — | — | — | — | 1 | — | — | — | — | — | — | — | 2 | 2 | 1 | 6 | 1 | — | 3 | — |
Temp °C | 31 | 28 | 31 | 31 | 27 | 30 | 30 | 27 | 30 | 29 | 27 | 30 | 30 | 27 | 30 | 30 | 28 | 31 | 30 | 28 |
Feels °C | 35 | 33 | 34 | 35 | 32 | 34 | 34 | 32 | 34 | 33 | 33 | 35 | 35 | 32 | 36 | 36 | 34 | 36 | 35 | 34 |
Swell 1 Height (m) Direction Period (s) | SSW 8 | SSW 7 | SSW 7 | SSW 7 | SE 10 | ESE 9 | SE 8 | SE 8 | SE 5 | ESE 9 | SE 4 | SE 4 | ESE 9 | ESE 9 | SE 8 | SE 8 | ESE 11 | ESE 11 | SE 12 | SE 11 |
| kJ | 56 | 26 | 19 | 18 | 14 | 15 | 11 | 33 | 10 | 17 | 6 | 3 | 16 | 16 | 11 | 10 | 23 | 22 | 24 | 19 |
Swell 2 Height (m) Direction Period (s) | SSW 8 | SSW 8 | ESE 10 | ESE 9 | E 9 | SE 9 | E 9 | E 9 | SE 8 | SE 8 | SE 9 | SW 6 | SW 6 | SSE 8 | ESE 11 | ESE 11 | SSE 8 | SSE 8 | E 11 | SE 8 |
| kJ | 19 | 12 | 18 | 16 | 14 | 13 | 13 | 7 | 10 | 9 | 20 | 5 | 5 | 7 | 23 | 23 | 6 | 6 | 9 | 2 |
Swell 3 Height (m) Direction Period (s) | SE 10 | ESE 10 | SE 10 | SE 10 | SSW 8 | SSW 6 | SSW 6 | SSW 6 | ESE 9 | SSW 5 | E 8 | SSE 9 | SSE 8 | SSW 6 | SSW 5 | SW 4 | — | SE 13 | SSE 8 | E 10 |
| kJ | 15 | 18 | 14 | 15 | 11 | 4 | 4 | 3 | 17 | 3 | 13 | 7 | 7 | 3 | 2 | 1 | — | 7 | 6 | 9 |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | ESE 3 | SE 3 | S 3 | SSE 4 | SE 4 | — | — | SSE 4 | — | — | — | — | N 3 | — | SW 7 |
| kJ | — | — | — | — | — | 1 | 2 | 1 | 10 | 6 | — | — | 1 | — | — | — | — | 3 | — | 2 |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 19 | 1 | 2 | 581 | 30 | 339 | 30 | 14 | 6 | 339 | 30 | 30 | 30 | 30 | 30 | 370 | 30 | 64 | 30 | 30 |
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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