
Surf Forecasts:
Asakawa surf forecast from 14 Jul 2026:
- Best quality surf: Wednesday 15 Jul, 12AM (local time) - 2.5ft (0.7m), 9s period, SSW swell with cross-offshore winds.
- Most powerful swell: Tuesday 14 Jul, 6PM (local time) - 2.5ft (0.8m), 9s period, SSW swell with 118 kJ wave energy.
- Next surfable swell (1★+): Wednesday 15 Jul, 12AM (local time) - 2.5ft (0.7m), 9s 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 12AM. The primary swell is predicted to be 0.7m and 9s period with a secondary swell of 0.4m and 11s. 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 0.8m 9s and forecast to arrive on Tuesday (Jul 14) at 6PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.3m 3s period and expected on Friday (Jul 17) at 12PM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 12AM (Wed 15th Jul) | 2.5ft (0.7m) 9s |
| Best Surf | 12AM (Wed 15th Jul) | 2.5ft (0.7m) 9s |
| Most Powerful | 6PM (Tue 14th Jul) | 2.5ft (0.8m) 9s |
Table - best surf conditions forecast for Asakawa over the next 16 days.
The Lowdown
Alright, let’s get into it. I’m lookin’ at the next couple of weeks here, and I gotta be straight with you—it’s a long, slow grind before we see anything worth paddling out for. The first solid action is a long way off, so if you’re itching for a wave, you’re gonna need some patience.
Right now, and for the better part of the next two weeks, it’s pretty flat and uninspiring. We’ve got tiny, weak swells and mostly poor conditions through to the end of July. There’s a real dry spell here. From Tuesday the 14th all the way through to late on the 25th, it’s just not happening. You’ll see scraps of knee-high slop, but the wind is never working for us, and the energy is pathetic—mostly in the double digits, like 20 to 60 on the energy scale. Nothing to write home about.
Then, things start to shift. Sunday the 26th of July morning—that’s the first real glimmer. At Asakawa, we’ve got a 2ft swell from the east, with a very long period of 15 seconds. That’s proper groundswell, and with glassy conditions, it’ll be clean. The energy jumps to 271, which is moderate. But it’s small, so don’t expect barrels.
The real standout, though, is Tuesday the 28th of July morning. This is the one to circle on the calendar. Asakawa will see a 5ft swell from the east-southeast, with a 15-second period. That’s a solid, powerful groundswell. The wind is coming from the east-northeast at 6 mph, which is cross-offshore—clean, peeling waves. The combined energy is a massive 1437, so there’s a lot of punch in the water. This is excellent for experienced surfers. It’s got that long period, so it’ll be better suited to a point break like this one, with nice lines. Crowds are sometimes an issue here, so be ready to share.
By Wednesday the 29th, it gets bigger—8ft to 10ft from the same direction, with an 18-second period. That’s huge, very long period groundswell. The energy readings are off the charts (4424 and 7121). This is expert-only territory, and the wind is light cross-on, so it won’t be as clean as Tuesday. Still, for the brave, it’s a monster session.
Water temperature at Asakawa is sitting around 78°, which is a bit colder than normal for this time of year—about 2° cooler—so you might want a thin spring suit if you’re sensitive.
So, bottom line: don’t bother until the 26th, but the 28th morning is your best bet. Tuesday the 28th, Asakawa, cross-offshore wind, solid groundswell, clean lines. That’s the one.
Rusty
Short Range ForecastMostly dry. Warm (max 32°C on Tue morning, min 27°C on Tue night). Wind will be generally light. | Days 4-6 Weather SummaryLight rain (total 4mm), mostly falling on Fri night. Warm (max 31°C on Fri morning, min 26°C on Fri night). Wind will be generally light. | ||||||||||||||||||||
Tuesday 14 | Wednesday 15 | Thursday 16 | Friday 17 | Saturday 18 | Sunday 19 | Monday 20 | |||||||||||||||
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 10 | SSW 10 | SSW 9 | SSW 9 | SSW 9 | SSW 8 | SSW 8 | SSW 8 | SSW 7 | SSW 7 | SE 10 | SE 10 | SE 10 | ESE 9 | SE 8 | ESE 9 | SE 8 | ESE 9 | SE 8 | SE 8 | SE 8 |
Wave Graph | |||||||||||||||||||||
209 | 157 | 86 | 84 | 84 | 76 | 98 | 43 | 48 | 37 | 18 | 15 | 33 | 54 | 33 | 25 | 16 | 16 | 25 | 18 | 17 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | glassy | on | cross-off | cross | on | glassy | cross | on | glassy | cross-off | cross-on | glassy | cross-on | on | glassy | glassy | on | cross-off | cross | glassy | off |
High Tide | 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 | 8:52AM1.63m | 9:39PM1.67m | 9:44AM1.49m | 10:10PM1.62m | ||||||||
Low Tide | 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 | 3:02AM0.69m | 3:11PM0.45m | 3:49AM0.67m | 3:45PM0.65m | ||||||||
5:01 | — | — | 5:01 | — | — | 5:03 | — | — | 5:03 | — | — | 5:03 | — | — | 5:05 | — | — | 5:05 | — | — | |
— | 7:14 | — | — | 7:13 | — | — | 7:13 | — | — | 7:12 | — | — | 7:12 | — | — | 7:12 | — | — | 7:10 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | 1 | — | 1 | 1 | — | 1 | — | 1 | 4 | — |
Temp °C | 32 | 32 | 29 | 32 | 32 | 28 | 31 | 31 | 28 | 31 | 31 | 27 | 30 | 30 | 27 | 30 | 30 | 28 | 31 | 31 | 28 |
Feels °C | 36 | 37 | 34 | 36 | 36 | 33 | 35 | 36 | 32 | 34 | 35 | 31 | 33 | 33 | 32 | 34 | 34 | 34 | 36 | 37 | 33 |
Swell 1 Height (m) Direction Period (s) | SSW 10 | SSW 10 | SSW 9 | SSW 9 | SSW 9 | SSW 8 | SSW 8 | SSW 8 | SSW 7 | SSW 7 | SSW 7 | SW 6 | SE 10 | ESE 9 | SE 8 | ESE 9 | SE 8 | ESE 9 | SE 8 | SE 8 | SE 8 |
209 | 157 | 86 | 84 | 84 | 76 | 98 | 43 | 48 | 37 | 18 | 10 | 33 | 54 | 33 | 25 | 16 | 16 | 25 | 18 | 17 | |
Swell 2 Height (m) Direction Period (s) | SE 12 | SE 12 | SE 11 | ESE 11 | ESE 10 | SE 11 | SE 10 | SSW 8 | ESE 10 | ESE 10 | SE 10 | SE 10 | SW 6 | SW 6 | SW 6 | SE 8 | SW 6 | SW 5 | SSW 6 | SW 6 | SW 6 |
36 | 36 | 31 | 44 | 43 | 18 | 16 | 19 | 18 | 18 | 15 | 14 | 9 | 9 | 9 | 17 | 8 | 7 | 3 | 9 | 9 | |
Swell 3 Height (m) Direction Period (s) | E 9 | E 9 | E 9 | E 10 | SE 11 | ESE 10 | ESE 9 | ESE 10 | SE 10 | SE 10 | E 9 | E 9 | E 9 | SSW 7 | ESE 10 | SW 6 | ESE 9 | SE 8 | ESE 12 | ESE 11 | ESE 11 |
2 | 2 | 15 | 17 | 18 | 18 | 17 | 18 | 15 | 14 | 15 | 15 | 15 | 5 | 10 | 5 | 15 | 9 | 14 | 13 | 12 | |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | NNE 3 | — | — | — | — | — | — | — | — | — | — |
— | — | — | — | — | — | — | — | — | — | 2 | — | — | — | — | — | — | — | — | — | — | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 0 | 19 | 0 | 22 | 11 | 0 | 41 | 19 | 0 | 0 | 30 | 30 | 30 | 30 | 2 | 6 | 30 | 245 | 30 | 30 | 293 |
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.










