
Surf Forecasts:
Asakawa surf forecast from 18 Jul 2026:
- Best quality surf: Monday 20 Jul, 9AM (local time) - 1.5ft (0.5m), 9s period, SE swell with glassy winds.
- Most powerful swell: Saturday 25 Jul, 3AM (local time) - 1.5ft (0.4m), 16s period, SE swell with 94 kJ wave energy.
- Next surfable swell (1★+): Monday 20 Jul, 9AM (local time) - 1.5ft (0.5m), 9s 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 Monday (Jul 20) at 9AM. The primary swell is predicted to be 0.5m and 9s period with a secondary swell of 0.2m and 9s. Another secondary swell of 0.4m and 8s 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 0.4m 16s and forecast to arrive on Saturday (Jul 25) at 3AM. Winds are predicted to be glassy at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.4m 3s period and expected on Friday (Jul 24) at 6AM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 9AM (Mon 20th Jul) | 1.5ft (0.5m) 9s |
| Best Surf | 9AM (Mon 20th Jul) | 1.5ft (0.5m) 9s |
| Most Powerful | 3AM (Sat 25th Jul) | 1.5ft (0.4m) 16s |
Table - best surf conditions forecast for Asakawa over the next 16 days.
The Lowdown
G’day, Rusty here. Look, I’ll be straight with you – the next week or so is a tough slog for Asakawa. This point break is inconsistent as it is, and for the first few days, we’re looking at tiny, weak swell with nothing to get excited about. The water temp is sitting at 82°, which is pretty much average for this time of year, so no surprises there.
We’ve got a real dry spell from now until Saturday the 26th of July. The surf is mostly knee-high or smaller, and the energy in the water is pathetic – we’re talking combined swell energy in the low 30s to 40s (31 to 42), which is barely a ripple. Winds are mostly light, with some glassy mornings on Monday the 20th, Tuesday the 21st, and Wednesday the 22nd, but even then, the swell is just 0.7ft to 1.0ft from the ESE. Not worth paddling out for.
There’s a slight uptick on Saturday the 25th and Sunday the 26th, with a 1ft SE swell and a period stretching to 15–16 seconds. That’s a long-period groundswell, and combined energy climbs to around 139 to 152 (moderate), but the wave comment says it all – “surfable waves but very ordinary conditions.” It’s still too small for a proper session.
Now, things get interesting from Monday the 27th of July. The swell jumps to 7ft from the SSE with a 15-second period, and combined energy rockets to 1768 (strong). The wind is cross-shore from the ENE at 6 mph, so it’s a bit crinkly. This is more of a moderate-to-intermediate size, but the rating says it’s marginal due to tide. By Tuesday the 28th, we’re looking at 12ft to 13ft from the SSE with a 14 to 17-second period. That’s a big, powerful groundswell, and the energy is massive – 4658 to 10256 (very strong). The wind is cross-offshore from the NE to NNE at 12 to 16 mph, keeping it clean. This is expert territory, though – over 8ft, so only for those with serious skills. The best session on offer is Tuesday afternoon, where the combination of big swell, clean conditions, and a solid 17-second period matches the optimum SE direction nicely. It’s a standout, but with “sometimes” crowds, expect a few locals out.
Wednesday the 29th of July is a full-on caution. The morning shows 25ft from the SE with a 16-second period, and a gale-force 40 mph onshore wind from the SSE. Combined energy hits 30144 (extreme) – that’s way too big and messy for Asakawa. It’s a “too big for this break” situation. The afternoon drops to 7ft but with strong cross-onshore winds, so it’s poor.
Thursday the 30th and Friday the 31st settle down, with 7ft to 8ft swell from the S and SW, but the wind is cross-onshore and choppy. Not great. By Friday morning, we get a clean 4ft from the S with cross-offshore NNE winds at 9 mph, and the energy is 274 (moderate). It’s a “good surf conditions” tag, but it’s small and fading.
Into the first week of August, it’s back to 2ft to 3ft, clean but weak. The energy is between 129 and 289 (weak to moderate). Nothing to write home about.
So, the real standout is Tuesday the 28th of July – that 13ft, 17-second SSE groundswell with clean cross-offshore winds is the pick of the lot. It’s big, powerful, and for experts only. Keep an eye on it, but don’t get your hopes up for the rest of the window.
Stay frothy,
Rusty
Short Range ForecastLight rain (total 6mm), mostly falling on Sat afternoon. Warm (max 31°C on Mon morning, min 26°C on Sat night). Wind will be generally light. | Days 5-7 Weather SummaryLight rain (total 8mm), mostly falling on Tue afternoon. Warm (max 32°C on Thu morning, min 27°C on Tue night). Wind will be generally light. | |||||||||||||||||||
Sat 18 | Sunday 19 | Monday 20 | Tuesday 21 | Wednesday 22 | Thursday 23 | Friday 24 | ||||||||||||||
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) | E 9 | SE 8 | ESE 9 | ESE 10 | SE 9 | SE 9 | ESE 11 | ESE 7 | ESE 11 | ESE 11 | ESE 11 | ESE 11 | ESE 10 | ESE 11 | SE 9 | SE 10 | SE 18 | SE 18 | SE 18 | SE 16 |
Wave Graph | ||||||||||||||||||||
13 | 24 | 17 | 18 | 20 | 39 | 12 | 9 | 11 | 23 | 22 | 22 | 22 | 11 | 14 | 25 | 50 | 49 | 49 | 42 | |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | on | on | on | on | cross | glassy | cross-on | cross-off | glassy | cross-on | cross-off | glassy | cross-on | glassy | glassy | on | glassy | cross-on | on | glassy |
High Tide | 9:08PM1.72m | 8:52AM1.63m | 9:39PM1.67m | 9:44AM1.49m | 10:10PM1.62m | 10:46AM1.35m | 10:42PM1.56m | 12:10PM1.25m | 11:21PM1.50m | 2:11PM1.24m | 00:16AM1.45m | 3:54PM1.32m | 1:31AM1.43m | |||||||
Low Tide | 3:02AM0.69m | 3:11PM0.45m | 3:49AM0.67m | 3:45PM0.65m | 4:40AM0.66m | 4:20PM0.84m | 5:41AM0.66m | 5:01PM1.01m | 6:53AM0.64m | 6:12PM1.14m | 8:11AM0.59m | 8:12PM1.20m | ||||||||
— | — | 5:05 | — | — | 5:05 | — | — | 5:05 | — | — | 5:07 | — | — | 5:07 | — | — | 5:07 | — | — | |
7:12 | — | — | 7:12 | — | — | 7:10 | — | — | 7:09 | — | — | 7:09 | — | — | 7:08 | — | — | 7:08 | — | |
mm | 2 | 2 | — | — | — | — | 2 | — | — | 2 | 1 | 1 | 2 | — | — | 1 | — | 1 | 5 | 7 |
Temp °C | 29 | 27 | 30 | 30 | 27 | 31 | 30 | 28 | 30 | 31 | 28 | 30 | 31 | 28 | 32 | 31 | 28 | 30 | 29 | 27 |
Feels °C | 33 | 32 | 33 | 33 | 32 | 35 | 34 | 34 | 36 | 36 | 33 | 35 | 36 | 33 | 36 | 36 | 33 | 35 | 34 | 33 |
Swell 1 Height (m) Direction Period (s) | SE 8 | SE 8 | SE 5 | SE 5 | SE 4 | SE 9 | ESE 7 | SSW 3 | ESE 11 | ESE 11 | ESE 11 | ESE 11 | ESE 10 | ESE 11 | SE 9 | SE 10 | SE 10 | SE 10 | SE 9 | SE 11 |
11 | 24 | 7 | 6 | 4 | 39 | 10 | 2 | 11 | 23 | 22 | 22 | 22 | 11 | 14 | 25 | 16 | 23 | 14 | 42 | |
Swell 2 Height (m) Direction Period (s) | E 9 | E 9 | ESE 9 | ESE 10 | ESE 9 | SSE 9 | SSE 8 | ESE 7 | ESE 6 | SSE 8 | SSE 8 | SSE 8 | SSE 8 | SE 8 | SSW 8 | SE 19 | SSE 8 | SE 18 | SE 18 | SE 16 |
13 | 7 | 17 | 18 | 15 | 7 | 7 | 9 | 4 | 6 | 6 | 6 | 6 | 2 | 6 | 15 | 7 | 49 | 49 | 42 | |
Swell 3 Height (m) Direction Period (s) | SSW 6 | E 8 | SE 8 | SE 8 | SE 9 | ESE 12 | ESE 11 | SSE 8 | SSE 8 | ESE 6 | ESE 6 | S 3 | SE 6 | SE 11 | E 10 | S 8 | SE 18 | S 7 | ESE 11 | S 8 |
4 | 5 | 10 | 9 | 20 | 14 | 12 | 7 | 7 | 4 | 4 | 1 | 1 | 4 | 8 | 5 | 50 | 4 | 13 | 4 | |
Wind waves Height (m) Direction Period (s) | SE 4 | SE 3 | — | SSW 7 | SSW 5 | SSW 8 | S 3 | — | — | — | SW 3 | — | S 3 | SSW 3 | — | ENE 3 | WSW 7 | N 3 | — | — |
3 | 3 | — | 9 | 2 | 22 | 3 | — | — | — | 1 | — | 1 | 1 | — | 1 | 4 | 1 | — | — | |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 352 | 43 | 30 | 30 | 30 | 0 | 30 | 30 | 30 | 30 | 289 | 30 | 963 | 293 | 289 | 511 | 0 | 22 | 11 | 0 |
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.










