
Surf Forecasts:
Asakawa surf forecast from 15 Jul 2026:
- Best quality surf: Wednesday 15 Jul, 9PM (local time) - 2.5ft (0.8m), 8s period, SSW swell with glassy winds.
- Most powerful swell: Thursday 16 Jul, 9AM (local time) - 3ft (0.9m), 8s period, SSW swell with 98 kJ wave energy.
- Next surfable swell (1★+): Wednesday 15 Jul, 9PM (local time) - 2.5ft (0.8m), 8s 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 Wednesday (Jul 15) at 9PM. The primary swell is predicted to be 0.8m and 8s period with a secondary swell of 0.4m and 10s. Another secondary swell of 0.8m and 7s 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 0.9m 8s and forecast to arrive on Thursday (Jul 16) at 9AM. Winds are predicted to be glassy at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.7m 4s period and expected on Wednesday (Jul 22) at 12PM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 9PM (Wed 15th Jul) | 2.5ft (0.8m) 8s |
| Best Surf | 9PM (Wed 15th Jul) | 2.5ft (0.8m) 8s |
| Most Powerful | 9AM (Thu 16th Jul) | 3ft (0.9m) 8s |
Table - best surf conditions forecast for Asakawa over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let’s have a look at what’s on the cards for the next couple of weeks.
Right off the bat, I gotta be straight with you – the first week and a half is a real struggle. We’re looking at a long, dry spell with barely a ripple. The first surfable waves show up on Wednesday morning, July 15th, at Asakawa, a point break that's inconsistent. It’s tiny, just 2ft from the SSW, with a weak combined energy of only 130. The water is sitting at 78°F, which is a bit colder than we’d expect for this time of year. The only saving grace is that early morning the wind is glassy, so the surface is clean. But honestly, it’s just a knee-high dribble. The rest of that week and into the next offers nothing but poor, tiny conditions with short-period, weak swell. The wind chops it up, or it’s just too small to bother with. You’d be better off doing something else.
Then, things get interesting. After a real blank run, we finally get a pulse. The first true standout is on Saturday morning, July 25th. The swell jumps to 5ft from the SW, with a combined energy of 393, and it’s glassy under clear skies. The period is a short 6 seconds, so it’ll be a bit lumpy and soft, but it’s the first real wave in a week. The wind is light and from the east, so it’s offshore. This is the best it’s been, and it’s not huge, so it’s good for all levels.
Now, looking further out, the real muscles start to flex. On Monday morning, July 27th, the swell pushes up to 7ft from the east, but the wind is onshore, making it a bit of a mess. The energy is climbing though, hitting 940. That’s more like it, but the conditions are holding it back.
The heavy hitters are lining up for the end of the month. Wednesday morning, July 29th, is a big one. We’re talking 8ft from the south with a very long period of 13 seconds and a massive combined energy of 2016. The wind is light cross-shore, so it’s a bit choppy, but that’s a proper groundswell. This is for the experienced crew only – it’s going to be powerful and a bit unruly, but the waves will have serious shape. A point break like Asakawa should handle this long-period energy well.
And then, Thursday morning, July 30th, is the biggest day of the outlook. The swell hits 8ft from the south, period stretching to 14 seconds, and the energy is off the charts at 2618. The wind is light cross-onshore, so it’s not perfect, but the power is unreal. This is a big, expert-only day. The waves will be heavy and the sets will be big. If you’re not comfortable in overhead, slabby conditions, give it a miss.
So, to wrap it up: forget the first week and a half. The call is Saturday morning, July 25th for the first decent, clean wave for everyone. For the advanced surfers chasing power, the standout is Wednesday, July 29th and Thursday, July 30th – both are big, powerful, and long-period, but the wind makes them a bit rough. They’re promising, but the long-range forecast always has a bit of uncertainty. Keep your eyes peeled.
Rusty.
Short Range ForecastLight rain (total 2mm), mostly falling on Fri afternoon. Warm (max 32°C on Wed morning, min 26°C on Fri night). Wind will be generally light. | Days 4-6 Weather SummaryModerate rain (total 16mm), heaviest on Sat night. Warm (max 30°C on Mon afternoon, min 26°C on Sat night). Wind will be generally light. | ||||||||||||||||||||
Wednesday 15 | Thursday 16 | Friday 17 | Saturday 18 | Sunday 19 | Monday 20 | Tuesday 21 | |||||||||||||||
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 9 | SSW 9 | SSW 8 | SSW 8 | SSW 8 | SSW 7 | SSW 7 | SE 10 | SE 10 | ESE 9 | ESE 8 | SE 8 | ESE 10 | E 10 | ESE 8 | ESE 9 | ESE 12 | SE 11 | ESE 11 | ESE 11 | SE 8 |
Wave Graph | |||||||||||||||||||||
84 | 84 | 75 | 98 | 66 | 32 | 33 | 16 | 16 | 15 | 12 | 19 | 32 | 17 | 27 | 25 | 14 | 31 | 23 | 23 | 11 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | glassy | cross-on | off | glassy | on | cross-off | cross | glassy | glassy | cross-on | on | on | on | on | cross | glassy | cross-on | cross-off | glassy | glassy | off |
High Tide | 7:26PM1.81m | 6:28AM1.88m | 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 | ||||||||
Low Tide | 12:35PM-0.09m | 00:52AM0.87m | 1:18PM-0.04m | 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 | ||||||||
5:01 | — | — | 5:03 | — | — | 5:03 | — | — | 5:03 | — | — | 5:05 | — | — | 5:05 | — | — | 5:05 | — | — | |
— | 7:13 | — | — | 7:13 | — | — | 7:12 | — | — | 7:12 | — | — | 7:12 | — | — | 7:10 | — | — | 7:09 | — | |
mm | — | — | — | — | — | — | — | 2 | — | — | 1 | 5 | 2 | 2 | — | 2 | 3 | 1 | — | 4 | — |
Temp °C | 32 | 32 | 28 | 31 | 31 | 28 | 31 | 29 | 28 | 29 | 29 | 27 | 28 | 29 | 27 | 29 | 30 | 28 | 31 | 30 | 28 |
Feels °C | 36 | 36 | 34 | 35 | 35 | 33 | 35 | 33 | 33 | 33 | 33 | 32 | 33 | 34 | 32 | 35 | 35 | 34 | 36 | 35 | 33 |
Swell 1 Height (m) Direction Period (s) | SSW 9 | SSW 9 | SSW 8 | SSW 8 | SSW 8 | SSW 7 | SSW 7 | SW 7 | SE 10 | ESE 9 | ESE 8 | SE 8 | ESE 10 | ESE 4 | ESE 8 | ESE 9 | SSE 8 | SE 11 | ESE 11 | ESE 11 | SE 8 |
84 | 84 | 75 | 98 | 66 | 32 | 33 | 12 | 14 | 15 | 12 | 18 | 32 | 7 | 27 | 25 | 14 | 31 | 23 | 23 | 10 | |
Swell 2 Height (m) Direction Period (s) | SE 11 | SE 10 | SE 11 | SE 11 | SE 10 | ESE 10 | ESE 10 | ESE 9 | ESE 9 | SE 9 | SE 8 | ESE 10 | SE 8 | SE 8 | SE 4 | SSE 9 | ESE 8 | SSE 8 | SSE 8 | SW 6 | SW 5 |
29 | 28 | 18 | 18 | 15 | 18 | 18 | 16 | 16 | 13 | 11 | 19 | 9 | 10 | 4 | 15 | 11 | 14 | 7 | 6 | 5 | |
Swell 3 Height (m) Direction Period (s) | E 10 | SE 11 | ESE 10 | E 10 | E 10 | SSW 8 | SE 10 | SE 10 | SW 6 | SSW 6 | SSW 6 | SSW 6 | ESE 3 | E 10 | SSE 9 | SE 4 | ESE 12 | SW 5 | SW 5 | SSE 8 | ESE 11 |
17 | 18 | 18 | 17 | 16 | 13 | 14 | 15 | 6 | 4 | 4 | 3 | 1 | 17 | 8 | 2 | 13 | 1 | 1 | 6 | 11 | |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | — | NE 3 | — | E 3 | — | ESE 4 | ESE 5 | — | SE 4 | — | SSW 6 | — | — | — | — |
— | — | — | — | — | — | — | 1 | — | 1 | — | 6 | 10 | — | 5 | — | 3 | — | — | — | — | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 0 | 19 | 0 | 0 | 19 | 1 | 14 | 30 | 30 | 43 | 352 | 14 | 43 | 581 | 14 | 6 | 30 | 6 | 30 | 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.










