Surf Forecasts:
Asakawa surf forecast from 27 Jul 2026:
- Best quality surf: Monday 3 Aug, 9PM (local time) - 6.5ft (2.0m), 16s period, ESE swell with glassy winds.
- Most powerful swell: Tuesday 4 Aug, 9AM (local time) - 10ft (3.0m), 18s period, ESE swell with 4,671 kJ wave energy.
- Next surfable swell (1★+): Tuesday 28 Jul, 6AM (local time) - 1.5ft (0.5m), 10s 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 Tuesday (Jul 28) at 6AM. The primary swell is predicted to be 0.6m and 8s period with a secondary swell of 0.5m and 10s. Another secondary swell of 0.4m and 4s is also forecast. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Asakawa in the next 16 days are 3.0m 18s and forecast to arrive on Tuesday (Aug 04) at 9AM. 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 4s period and expected on Friday (Jul 31) at 6AM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 6AM (Tue 28th Jul) | 1.5ft (0.5m) 10s |
| Best Surf | 9PM (Mon 3rd Aug) | 6.5ft (2.0m) 16s |
| Most Powerful | 9AM (Tue 4th Aug) | 10ft (3.0m) 18s |
Table - best surf conditions forecast for Asakawa over the next 16 days.
The Lowdown
Alright, this is Rusty, your local surf reporter, bringing you the full rundown on Asakawa for the next couple of weeks.
Look, if you’re looking for a quick fix, you’re going to be waiting a while. The first week is a bit of a write-off. We’ve got a few days of small, weak waves, and the wind is all over the place. It’s not going to be worth paddling out for most of it. The first real glimmer of hope doesn’t show up until Sunday, August 2nd, but even then it’s a marginal call with a little bump in energy.
The real action, the kind that gets the heart pumping, is locked in for the second week. From Monday, August 3rd, the swell starts to build, and it gets serious. The standout is going to be Wednesday, August 5th. The morning session is looking absolutely firing. We’re talking a solid 13 ft swell from the ESE, and with that clean, cross-offshore wind from the NNE, it’s going to be a dream for experienced surfers. The wave energy is massive (10800), and the period is a very long 18 seconds, which means these are groundswell lines with real power. This is a set-up for expert-level waves only. The water temp is about average for the time of year, so you won’t need a steamer, but you will need your wits about you.
After that peak, Thursday, August 6th, gets truly huge. The morning shows 25 ft, and the combined energy is off the charts (34987). The wind is still favourable, but this is way too big for any paddle surfing. This is big-wave territory, or honestly, with the wind still holding, this set-up looks more interesting for kite surfing than paddle surfing. It’s a monster swell.
The swell hangs around for a few days, but the wind turns onshore and the quality drops. By Sunday, August 9th, it’s poor again, though there’s a small window on the 9th afternoon with glassy conditions and a smaller 4 ft swell that might be worth a look for a cruiser session. The last few days of the forecast are back to small, weak conditions.
So, to sum it up: the first week is a dud. The second week offers a couple of days of absolute world-class, big-wave conditions for experts only. If you’re not an expert, give it a wide berth. The best session on offer without a doubt is the morning of Wednesday, August 5th.
Rusty
Short Range ForecastMostly dry. Warm (max 33°C on Tue morning, min 27°C on Thu night). Wind will be generally light. | Days 4-6 Weather SummaryLight rain (total 7mm), mostly falling on Sun afternoon. Warm (max 33°C on Fri morning, min 26°C on Sun night). Wind will be generally light. | ||||||||||||||||||||
Tuesday 28 | Wednesday 29 | Thursday 30 | Friday 31 | Saturday 1 | Sunday 2 | Monday 3 | |||||||||||||||
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 | SSW 8 | 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 15 | ESE 14 | ESE 15 | ESE 15 | ESE 16 | ESE 16 | ESE 17 |
Wave Graph  | |||||||||||||||||||||
 kJ | 49 | 99 | 48 | 48 | 48 | 38 | 23 | 23 | 23 | 23 | 26 | 20 | 28 | 29 | 56 | 118 | 266 | 505 | 1003 | 1589 | 2867 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | glassy | cross-on | off | glassy | glassy | glassy | glassy | on | off | glassy | glassy | glassy | glassy | on | glassy | glassy | on | on | cross-on | on | on |
High Tide | 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 | 7:37AM1.73m | 8:25PM1.74m | 8:17AM1.67m | 8:51PM1.72m | ||||||||
Low Tide | 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 | 2:00PM0.31m | 2:22AM0.61m | 2:31PM0.44m | ||||||||
 |  |  | | | | | |  | | | | | | |  |  |  | | | | |
 | 5:11 | — | — | 5:11 | — | — | 5:11 | — | — | 5:13 | — | — | 5:13 | — | — | 5:13 | — | — | 5:15 | — | — |
 | — | 7:06 | — | — | 7:05 | — | — | 7:04 | — | — | 7:04 | — | — | 7:02 | — | — | 7:01 | — | — | 7:00 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 1 | 3 | 3 | 3 | — | — |
Temp °C | 33 | 33 | 29 | 31 | 32 | 29 | 33 | 32 | 29 | 33 | 33 | 29 | 32 | 31 | 28 | 31 | 30 | 27 | 30 | 30 | 27 |
Feels °C | 37 | 37 | 34 | 35 | 36 | 33 | 36 | 36 | 33 | 36 | 37 | 33 | 36 | 35 | 32 | 35 | 34 | 32 | 33 | 34 | 32 |
Swell 1 Height (m) Direction Period (s) | SE 10 | SE 10 | SSW 6 | SSW 6 | SSW 8 | SSW 5 | SE 10 | SE 10 | SE 10 | SE 9 | SE 9 | SE 10 | SE 10 | SE 11 | SE 11 | ESE 14 | ESE 15 | ESE 15 | ESE 16 | ESE 16 | ESE 17 |
| kJ | 49 | 49 | 45 | 17 | 32 | 11 | 23 | 23 | 23 | 23 | 23 | 14 | 28 | 29 | 41 | 118 | 266 | 505 | 1003 | 1589 | 2867 |
Swell 2 Height (m) Direction Period (s) | S 8 | SE 13 | SE 10 | SE 10 | SE 10 | ESE 10 | SSW 8 | SSW 7 | SSW 5 | SSW 5 | SSW 7 | SE 11 | SW 4 | ESE 16 | SE 15 | SE 9 | SE 9 | SE 10 | SSE 10 | S 8 | S 8 |
| kJ | 36 | 28 | 48 | 48 | 48 | 38 | 19 | 11 | 2 | 2 | 5 | 20 | 1 | 25 | 56 | 21 | 14 | 16 | 10 | 5 | 4 |
Swell 3 Height (m) Direction Period (s) | SE 14 | SE 13 | SSW 8 | SSW 8 | SE 13 | SSW 7 | SE 14 | SSW 6 | S 7 | SE 13 | SE 13 | S 7 | S 7 | — | S 7 | SSE 11 | ESE 20 | S 8 | S 8 | S 8 | E 15 |
| kJ | 29 | 27 | 13 | 21 | 26 | 10 | 8 | 4 | 4 | 6 | 26 | 1 | 1 | — | 1 | 12 | 37 | 5 | 5 | 5 | 38 |
Wind waves Height (m) Direction Period (s) | SW 4 | SSW 8 | — | — | SW 6 | — | — | — | — | N 3 | NE 3 | — | NNE 3 | NE 3 | E 3 | — | E 6 | ESE 6 | ESE 6 | ESE 5 | ESE 5 |
| kJ | 5 | 99 | — | — | 30 | — | — | — | — | 6 | 2 | — | 1 | 1 | 1 | — | 6 | 25 | 36 | 42 | 46 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 0 | 11 | 0 | 0 | 0 | 1 | 30 | 357 | 43 | 43 | 1 | 575 | 2436 | 473 | 0 | 0 | 11 | 19 | 19 | 19 | 14 |
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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