
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, 9AM (local time) - 13ft (4.0m), 17s period, S swell with 10,270 kJ wave energy.
- Next surfable swell (1★+): Thursday 9 Jul, 6AM (local time) - 8ft (2.5m), 15s 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 Thursday (Jul 09) at 6AM. The primary swell is predicted to be 2.5m and 15s period with a secondary swell of 0.4m and 8s. 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 9AM. Winds are predicted to be onshore 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 15) at 6AM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 6AM (Thu 9th Jul) | 8ft (2.5m) 15s |
| Best Surf | 12AM (Sat 11th Jul) | 13ft (4.0m) 17s |
| Most Powerful | 9AM (Sat 11th Jul) | 13ft (4.0m) 17s |
Table - best surf conditions forecast for Asakawa over the next 16 days.
Alright folks, Rusty here. Let’s get into it for Asakawa. We’ve got a bit of a slow start, but there’s a couple of real standout windows coming up if you’re willing to wait for the right conditions.
The first few days are a write-off. Thursday the 9th has some size but the wind is on it and the tide is all wrong. Honestly, not worth paddling out for. The real action kicks off on Friday the 10th.
Friday morning, the 10th of July, is our first real highlight. The swell is a solid 12 ft from the S, with a long 17-second period pushing a heap of energy through (6993). The wind is glassy, which is a massive bonus—that’s going to leave the surface clean as a whistle. This is a point break, so that long-period groundswell will wrap in nicely. But be warned, 12 ft is big, this is expert territory only. It’s inconsistent here, so you’ll be waiting for the sets, but when they come, they’ll be worth it. Crowds are possible.
Saturday the 11th keeps the size at 13 ft from the S and SSW, with that same 17-second period. The energy is pumping—over 10,000 (10270) on Saturday morning. The wind is light and on it, but the sheer power is there for the experienced crew. Sunday the 12th morning drops to 10 ft from the SSW, still with a long 16-second period, and the wind goes glassy again. The energy is still strong (4280), and those conditions will be excellent for experienced surfers.
After that, the surf drops off quickly through the middle of the week. Monday the 13th has a small 5 ft but glassy conditions, and then it pretty much flatlines. From Tuesday the 14th through to the 19th, we’re looking at poor to marginal surf with weak energy (mostly under 500). There’s a long gap of nothing really worthwhile.
Now, if you can hold out until Tuesday the 21st of July, there’s another big pulse on the horizon. Monday the 20th starts to build with 7 ft and glassy conditions, but Tuesday the 21st morning is the standout from this second window. The forecast shows a massive 15 ft swell from the SE, with a 14-second period, and the energy reading is huge at 15615. The wind is light and cross-on, so it won’t be perfect, but that’s a lot of water moving. Again, expert-only at that size at Asakawa. Wednesday the 22nd has a cleaner 7 ft with glassy wind, but the period is short (8 seconds), so it’ll be a bit weaker.
So, bottom line: The best two windows are Friday morning, the 10th, and Tuesday morning, the 21st of July. Both are big, powerful swells. The water temp is about average for the time of year, nothing unusual to report.
Stay safe out there.
Rusty
Short Range ForecastMostly dry. Warm (max 28°C on Fri morning, min 22°C on Thu night). Wind will be generally light. | Days 5-7 Weather SummaryHeavy rain (total 24mm), heaviest during Mon afternoon. Warm (max 29°C on Sun morning, min 24°C on Sat night). Wind will be generally light. | ||||||||||||||||||||
Thursday 9 | Friday 10 | Saturday 11 | Sunday 12 | Monday 13 | Tuesday 14 | Wed 15 | |||||||||||||||
Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | |
Swell Height Map | |||||||||||||||||||||
Wave Height (m) Direction Period (s) | SSE 15 | SSE 15 | SSE 15 | SSE 15 | S 17 | S 17 | S 17 | S 17 | SSW 17 | SSW 17 | SSW 16 | SSW 14 | SSW 13 | SSW 12 | S 11 | SSW 11 | SSW 10 | SSW 10 | SSW 9 | SSW 9 | E 10 |
Wave Graph | |||||||||||||||||||||
3156 | 3009 | 3288 | 3640 | 6993 | 7486 | 9483 | 10270 | 9623 | 8256 | 4272 | 2350 | 1089 | 680 | 279 | 356 | 214 | 163 | 118 | 64 | 47 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | on | on | glassy | glassy | on | glassy | on | on | cross | glassy | cross-on | glassy | glassy | cross-on | off | glassy | cross-on | glassy | on | on |
High Tide | 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 | 5:39AM1.86m | ||||||||
Low Tide | 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 | 12:35PM-0.09m | ||||||||
— | 4:58 | — | — | 4:58 | — | — | 5:00 | — | — | 5:00 | — | — | 5:01 | — | — | 5:01 | — | — | 5:01 | — | |
7:15 | — | 7:15 | — | — | 7:15 | — | — | 7:15 | — | — | 7:14 | — | — | 7:14 | — | — | 7:14 | — | — | 7:13 | |
mm | — | — | — | — | — | — | — | — | — | — | — | — | 4 | 1 | 10 | 4 | 2 | 3 | — | — | — |
Temp °C | 24 | 27 | 27 | 23 | 28 | 27 | 25 | 27 | 27 | 25 | 29 | 28 | 26 | 28 | 28 | 26 | 28 | 28 | 26 | 28 | 28 |
Feels °C | 28 | 29 | 30 | 27 | 31 | 30 | 30 | 30 | 30 | 29 | 32 | 32 | 30 | 32 | 33 | 31 | 33 | 33 | 31 | 31 | 31 |
Swell 1 Height (m) Direction Period (s) | SSE 15 | SSE 15 | SSE 15 | SSE 15 | S 17 | S 17 | S 17 | S 17 | SSW 17 | SSW 17 | SSW 16 | SSW 14 | SSW 13 | SSW 12 | S 11 | SSW 11 | SSW 10 | SSW 10 | SSW 9 | SSW 9 | SSW 9 |
3156 | 3009 | 3288 | 3640 | 6993 | 7486 | 9483 | 10270 | 9623 | 8256 | 4272 | 2350 | 1089 | 680 | 279 | 356 | 214 | 163 | 118 | 64 | 45 | |
Swell 2 Height (m) Direction Period (s) | E 8 | S 19 | E 8 | S 18 | — | — | — | — | — | — | SE 15 | E 9 | S 12 | SE 11 | SSW 12 | SE 10 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | E 10 |
36 | 475 | 46 | 1129 | — | — | — | — | — | — | 8 | 7 | 72 | 18 | 184 | 23 | 15 | 26 | 35 | 28 | 47 | |
Swell 3 Height (m) Direction Period (s) | — | ESE 8 | — | E 8 | — | — | — | — | — | — | — | — | SE 9 | E 9 | SE 11 | SE 12 | SE 10 | SE 12 | SSE 12 | SE 10 | SE 10 |
— | 22 | — | 34 | — | — | — | — | — | — | — | — | 31 | 7 | 18 | 22 | 15 | 23 | 14 | 17 | 16 | |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | SSW 3 | SW 4 | — | NNE 3 | N 2 | NNE 3 | ESE 4 |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | 3 | 12 | — | 2 | 1 | 1 | 3 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 6 | 19 | 11 | 0 | 0 | 11 | 0 | 11 | 581 | 2 | 0 | 14 | 0 | 0 | 11 | 0 | 0 | 245 | 0 | 4 | 19 |
Best forecast wave conditions in Shikoku | |||||||||||||||||||||
Best forecast wave conditions in Japan | |||||||||||||||||||||
Header Global | |||||||||||||||||||||
- Map Icons:
Break
Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)
Wind Speed (km/h)
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.











