
Surf Forecasts:
Asakawa surf forecast from 26 Jul 2026:
- Best quality surf: Sunday 2 Aug, 9PM (local time) - 3ft (0.9m), 14s period, ESE swell with glassy winds.
- Most powerful swell: Monday 3 Aug, 3AM (local time) - 3.5ft (1.0m), 14s period, ESE swell with 378 kJ wave energy.
- Next surfable swell (1★+): Monday 27 Jul, 12AM (local time) - 1.5ft (0.4m), 14s 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 Monday (Jul 27) at 12AM. The primary swell is predicted to be 0.4m and 14s period with a secondary swell of 0.6m and 8s. Another secondary swell of 0.4m and 3s is also forecast. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at Asakawa in the next 16 days are 1.0m 14s and forecast to arrive on Monday (Aug 03) at 3AM. Winds are predicted to be glassy at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.4m 3s period and expected on Monday (Jul 27) at 9AM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 12AM (Mon 27th Jul) | 1.5ft (0.4m) 14s |
| Best Surf | 9PM (Sun 2nd Aug) | 3ft (0.9m) 14s |
| Most Powerful | 3AM (Mon 3rd Aug) | 3.5ft (1.0m) 14s |
Table - best surf conditions forecast for Asakawa over the next 16 days.
The Lowdown
Alright folks, lookin' at the next couple of weeks here, and honestly, we've got a long wait ahead for anything decent. The surf is gonna be pretty flat and sorry for itself for a solid week or more. We're looking at small, weak waves from the southeast until things finally wake up.
So, for Asakawa, it's a tough start. From Sunday the 26th right through to the end of July, it's mostly poor surf with tiny 1 ft to 2 ft waves. There are some glassy mornings in there – Monday the 27th, Tuesday the 28th, Wednesday the 29th – but with combined energy readings barely cracking 170, it's just not worth paddling out. The water is sitting at 83°F, which is a touch warmer than normal for this time of year, but that's about the only highlight.
We then drift through the first days of August with no real improvement. The swell stays small and weak, with very low energy levels, all the way until the 3rd. There's a bit of a pulse pushing through on the 3rd, with 4 ft to 4 ft swell from the ESE and energy jumping up to 603 and 803 (moderate), but the wind is onshore, so it's gonna be a messy, marginal affair. Not worth gettin' wet for.
Now, here's the real standout. The whole second week builds to something special. The first true highlight is the morning of Tuesday, August 4th. The swell jumps to 6 ft from the ESE with a very long 16-second period. The combined energy is a solid 1613 (strong). And get this – it's glassy with a light Easterly breeze. That's clean, powerful, groundswell waves for experienced surfers. It's a bit big for beginners, but for the rest of us, that's a great session.
But the real monster, the one that's got me excited, is Friday, August 7th. Holy moly. The swell is massive at 15 ft in the morning, building to 16 ft in the afternoon from the ESE, with a 17-second period. The combined energy is screaming at 11,032 and 12,507 (very strong). And it's glassy all day. This is exceptional, expert-only surf. This is not a day for the faint of heart or the average punter – you need to know what you're doing. The morning of Saturday the 8th is nearly as good, with 16 ft swell and clean 6 mph offshore wind from the NE. That's a top-tier window for the big wave chargers.
After that, the swell drops off a cliff. By Sunday the 9th, it's back to tiny 2 ft waves and weak energy. The standouts are clear: the glassy, powerful morning of August 4th for the experienced crowd, and the absolutely stellar, huge, and clean conditions of August 7th and the morning of the 8th for the experts only. The long period swell at a point break like Asakawa is gonna set up beautifully, with long, waiting sets and proper shape, though it might be a bit too straight for a beach break.
Rusty.
Short Range ForecastLight rain (total 9mm), mostly falling on Mon afternoon. Warm (max 32°C on Mon morning, min 27°C on Sun night). Wind will be generally light. | Days 5-7 Weather SummarySome drizzle, heaviest during Thu afternoon. Warm (max 33°C on Fri morning, min 27°C on Wed night). Wind will be generally light. | ||||||||||||||||||
Monday 27 | Tuesday 28 | Wednesday 29 | Thursday 30 | Friday 31 | Saturday 1 | ||||||||||||||
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 14 | SE 14 | SE 14 | SE 14 | SE 10 | SE 10 | SE 10 | SE 10 | SE 10 | ESE 10 | SE 10 | SE 10 | SE 10 | SE 9 | SE 13 | SE 11 | SE 10 | SE 11 | SE 11 |
Wave Graph | |||||||||||||||||||
74 | 72 | 70 | 65 | 49 | 54 | 48 | 48 | 48 | 38 | 23 | 23 | 23 | 24 | 26 | 20 | 28 | 40 | 30 | |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | glassy | cross-on | cross-off | glassy | cross-on | off | glassy | glassy | off | glassy | on | glassy | cross | glassy | off | glassy | cross-on | off |
High Tide | 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 | 10:33PM1.11m | 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 | — | — | 5:11 | — | — | 5:11 | — | — | 5:11 | — | — | 5:13 | — | — | 5:13 | — | — | |
7:07 | — | 7:07 | — | — | 7:06 | — | — | 7:05 | — | — | 7:04 | — | — | 7:04 | — | — | 7:02 | — | |
mm | — | — | 4 | — | — | 2 | — | 1 | 2 | — | — | 1 | — | — | — | — | — | — | — |
Temp °C | 28 | 32 | 31 | 28 | 32 | 32 | 28 | 31 | 31 | 28 | 32 | 32 | 29 | 33 | 32 | 29 | 33 | 33 | 29 |
Feels °C | 32 | 36 | 35 | 33 | 36 | 36 | 33 | 35 | 35 | 32 | 35 | 37 | 34 | 36 | 36 | 33 | 36 | 37 | 33 |
Swell 1 Height (m) Direction Period (s) | S 8 | S 8 | S 9 | S 8 | S 8 | SE 10 | SSW 6 | SSW 6 | SE 10 | SSW 5 | SE 10 | SE 10 | SE 10 | SE 9 | SE 9 | SE 10 | SE 10 | SE 11 | SE 11 |
50 | 49 | 55 | 51 | 36 | 49 | 33 | 19 | 48 | 16 | 23 | 23 | 23 | 23 | 21 | 14 | 28 | 40 | 30 | |
Swell 2 Height (m) Direction Period (s) | SE 14 | SE 10 | SE 10 | SE 10 | SE 10 | SE 13 | SE 10 | SE 10 | SSW 8 | ESE 10 | SSW 5 | S 7 | SSW 7 | SSW 4 | SE 13 | SE 11 | SSW 4 | SSW 7 | ESE 9 |
74 | 51 | 50 | 50 | 49 | 28 | 48 | 48 | 21 | 38 | 4 | 10 | 10 | 4 | 26 | 20 | 2 | 4 | 7 | |
Swell 3 Height (m) Direction Period (s) | SE 11 | SE 14 | SE 14 | SE 14 | SE 14 | S 8 | SSW 8 | SSW 8 | SE 13 | SE 12 | SSW 8 | SE 12 | SE 12 | SE 12 | SSW 4 | SSW 5 | S 7 | — | ESE 17 |
40 | 72 | 70 | 65 | 29 | 1 | 22 | 12 | 26 | 25 | 11 | 6 | 6 | 24 | 2 | 2 | 1 | — | 28 | |
Wind waves Height (m) Direction Period (s) | SW 3 | NNE 3 | NNE 3 | — | SW 4 | SSW 8 | — | — | SSW 5 | — | — | SSW 6 | SW 5 | — | NNE 3 | — | — | — | — |
2 | 3 | 1 | — | 3 | 54 | — | — | 10 | — | — | 4 | 11 | — | 1 | — | — | — | — | |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 2 | 0 | 0 | 11 | 0 | 0 | 11 | 0 | 0 | 0 | 0 | 6 | 30 | 43 | 30 | 511 | 6 | 459 | 581 |
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.










