
Surf Forecasts:
Asakawa surf forecast from 12 Jul 2026:
- Best quality surf: Sunday 12 Jul, 3PM (local time) - 8ft (2.5m), 14s period, SSW swell with glassy winds.
- Most powerful swell: Sunday 12 Jul, 3PM (local time) - 8ft (2.5m), 14s period, SSW swell with 2,763 kJ wave energy.
- Next surfable swell (1★+): Sunday 12 Jul, 3PM (local time) - 8ft (2.5m), 14s 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 Sunday (Jul 12) at 3PM. The primary swell is predicted to be 2.5m and 14s period with a secondary swell of 0.1m and 15s. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Asakawa in the next 16 days are 2.5m 14s and forecast to arrive on Sunday (Jul 12) at 3PM. Winds are predicted to be glassy at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.5m 3s period and expected on Tuesday (Jul 14) at 6AM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 3PM (Sun 12th Jul) | 8ft (2.5m) 14s |
| Best Surf | 3PM (Sun 12th Jul) | 8ft (2.5m) 14s |
| Most Powerful | 3PM (Sun 12th Jul) | 8ft (2.5m) 14s |
Table - best surf conditions forecast for Asakawa over the next 16 days.
Alright folks, Rusty here. We’ve got a 16-day window for Asakawa, and it’s a real mixed bag—a front-loaded pulse of serious size that fades fast, then a long wait for the next decent one.
The first few days are the highlight, but only for the experienced crew. Sunday morning, the 12th of July, is the standout. You’re looking at a solid 10ft groundswell from the SSW with a very long period of 16 seconds pushing in. The combined energy is pumping at 4895, which is seriously strong. Best part? It’s glassy, dead calm wind. That’s a recipe for some heavy, powerful lines at this point break. The water is a bit colder than normal for this time of year, sitting at 77°. This is expert territory only, mind you—that size with that period will be a handful.
Sunday afternoon holds up nicely with 8ft SSW swell and still glassy, just a risk of storms. The energy drops to 2771, still strong. Monday morning, the 13th, we’re down to 5ft but still a solid 12-second period, glassy and clean—expect very good surf. It stays rideable through Monday afternoon at 5ft, but after that, the swell drops off a cliff.
From Tuesday morning, the 14th, through the rest of the week, it gets small and ordinary. We’re looking at a run of poor conditions or very marginal surf, with the swell dipping below 3ft and the energy dropping into the low hundreds or even double digits. It’s a long gap of flat to tiny waves for about four days.
Then, just when you think it’s over, Saturday morning, the 18th of July, brings a new pulse: 6ft from the ESE with a 13-second period. Energy is back up to 939, moderate. It’s a bit lumpy with a cross-onshore wind, so it’s marginal, but it’s something. An interesting note: Sunday morning, the 19th, shows a clean 8ft ESE swell, glassy calm, but it’s a short 9-second period—good energy at 1595, but that short period might make it a bit crumbly and less organized. It’s a promising option for experienced surfers again, but it’s a week out, so a bit less certain.
The rest of the second week looks small and mostly poor, with only a few glimmers of small, clean, but weak waves. Not much to write home about after that Sunday peak.
So, bottom line: the best on offer is the Sunday the 12th through Monday the 13th—big, powerful, and clean. Then a long wait for a decent but less reliable pulse around the 18th-19th. Get on it early if you’ve got the skills.
Rusty.
Short Range ForecastLight rain (total 3mm), mostly falling on Sun afternoon. Warm (max 32°C on Tue morning, min 26°C on Sun night). Wind will be generally light. | Days 4-6 Weather SummaryModerate rain (total 13mm), heaviest on Thu afternoon. Warm (max 31°C on Wed morning, min 25°C on Fri night). Wind will be generally light. | ||||||||||||||||||||
Sunday 12 | Monday 13 | Tuesday 14 | Wednesday 15 | Thursday 16 | Friday 17 | Saturday 18 | |||||||||||||||
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) | SSW 16 | SSW 14 | SSW 13 | SSW 12 | SSW 11 | SSW 11 | SSW 10 | SSW 10 | SSW 9 | SSW 9 | SSW 9 | ESE 10 | SSW 8 | SSW 8 | SSW 8 | ESE 10 | SE 10 | ESE 16 | ESE 13 | ESE 13 | ESE 11 |
Wave Graph | |||||||||||||||||||||
4895 | 2763 | 1256 | 683 | 512 | 292 | 209 | 166 | 86 | 64 | 61 | 39 | 37 | 35 | 23 | 18 | 17 | 469 | 908 | 838 | 1796 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | glassy | glassy | cross-off | glassy | glassy | off | glassy | on | glassy | cross-on | on | glassy | cross | glassy | glassy | cross-on | on | glassy | cross-on | on | glassy |
High Tide | 5:16PM1.67m | 3:49AM1.73m | 6:04PM1.75m | 4:46AM1.81m | 6:47PM1.80m | 5:39AM1.86m | 7:26PM1.81m | 6:28AM1.88m | 8:02PM1.79m | 7:16AM1.84m | 8:36PM1.76m | 8:04AM1.75m | 9:08PM1.72m | ||||||||
Low Tide | 10:04AM0.12m | 10:28PM1.08m | 10:59AM-0.01m | 11:22PM1.02m | 11:49AM-0.08m | 00:08AM0.95m | 12:35PM-0.09m | 00:52AM0.87m | 1:18PM-0.04m | 1:35AM0.79m | 1:58PM0.09m | 2:18AM0.73m | 2:36PM0.26m | ||||||||
5:00 | — | — | 5:01 | — | — | 5:01 | — | — | 5:01 | — | — | 5:03 | — | — | 5:03 | — | — | 5:03 | — | — | |
— | 7:14 | — | — | 7:14 | — | — | 7:14 | — | — | 7:13 | — | — | 7:13 | — | — | 7:12 | — | — | 7:12 | — | |
mm | — | 2 | 1 | — | — | — | — | — | — | — | — | — | 1 | 5 | 5 | 1 | 1 | — | 1 | — | — |
Temp °C | 31 | 30 | 27 | 31 | 31 | 29 | 32 | 32 | 28 | 31 | 31 | 28 | 31 | 29 | 27 | 29 | 29 | 26 | 28 | 29 | 25 |
Feels °C | 35 | 36 | 32 | 35 | 36 | 34 | 36 | 36 | 32 | 35 | 35 | 33 | 35 | 34 | 32 | 34 | 33 | 32 | 32 | 33 | 30 |
Swell 1 Height (m) Direction Period (s) | SSW 16 | SSW 14 | SSW 13 | SSW 12 | SSW 11 | SSW 11 | SSW 10 | SSW 10 | SSW 9 | SSW 9 | SSW 9 | SSW 8 | SSW 8 | SSW 8 | SSW 8 | ESE 10 | ESE 9 | ESE 16 | ESE 13 | ESE 13 | ESE 11 |
4895 | 2763 | 1256 | 683 | 512 | 292 | 209 | 166 | 86 | 64 | 61 | 39 | 37 | 35 | 23 | 18 | 17 | 469 | 908 | 838 | 1307 | |
Swell 2 Height (m) Direction Period (s) | — | SE 15 | SE 10 | SE 10 | SE 10 | SE 12 | SE 12 | SE 12 | SE 11 | SE 11 | ESE 10 | ESE 10 | SE 10 | SE 10 | ESE 10 | SW 7 | SE 10 | SE 4 | SE 4 | ESE 6 | SW 7 |
— | 8 | 23 | 17 | 17 | 21 | 36 | 36 | 31 | 29 | 42 | 39 | 14 | 15 | 18 | 13 | 14 | 7 | 8 | 53 | 2 | |
Swell 3 Height (m) Direction Period (s) | — | — | SE 11 | SE 13 | SE 13 | E 9 | E 9 | E 9 | SE 11 | SE 11 | S 8 | SE 11 | ESE 10 | ESE 10 | SE 10 | SE 9 | SW 6 | SE 10 | SSW 7 | SSW 7 | SW 9 |
— | — | 20 | 7 | 7 | 6 | 2 | 6 | 20 | 18 | 1 | 18 | 19 | 18 | 15 | 14 | 6 | 35 | 5 | 5 | 3 | |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | NNE 3 | NE 3 | WSW 3 | — | — | — | — | — | — | SSE 2 | — | — | ESE 4 | — | ESE 11 |
— | — | — | — | — | — | 1 | 2 | 1 | — | — | — | — | — | — | 1 | — | — | 18 | — | 1796 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 19 | 0 | 30 | 19 | 0 | 30 | 0 | 1 | 43 | 459 | 0 | 19 | 19 | 0 |
Best forecast wave conditions in Shikoku | |||||||||||||||||||||
Best forecast wave conditions in Japan | |||||||||||||||||||||
Header Global | |||||||||||||||||||||
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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.










