Surf Forecasts:
Asakawa surf forecast from 13 Jul 2026:
- Best quality surf: Monday 13 Jul, 3PM (local time) - 4.5ft (1.4m), 11s period, SSW swell with glassy winds.
- Most powerful swell: Monday 13 Jul, 3PM (local time) - 4.5ft (1.4m), 11s period, SSW swell with 447 kJ wave energy.
- Next surfable swell (1★+): Monday 13 Jul, 3PM (local time) - 4.5ft (1.4m), 11s 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 Monday (Jul 13) at 3PM. The primary swell is predicted to be 1.4m and 11s period with a secondary swell of 0.3m and 10s. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Asakawa in the next 16 days are 1.4m 11s and forecast to arrive on Monday (Jul 13) 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 0.4m 3s period and expected on Tuesday (Jul 14) at 9AM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 3PM (Mon 13th Jul) | 4.5ft (1.4m) 11s |
| Best Surf | 3PM (Mon 13th Jul) | 4.5ft (1.4m) 11s |
| Most Powerful | 3PM (Mon 13th Jul) | 4.5ft (1.4m) 11s |
Table - best surf conditions forecast for Asakawa over the next 16 days.
Alright folks, Rusty here. Let’s talk about what’s on the menu for Asakawa over the next couple of weeks.
We’ve got a bit of a slow cooker start, but there’s a promising lift on the horizon. The first bit of worthwhile surf kicks off on Monday the 13th. The real gem of the entire forecast is that Monday morning session. We’re looking at a clean 5ft SSW groundswell with a solid 12-second period. The wind is glassy from the ESE, so the surface will be like a mirror. The water is sitting at 77°, which is a bit colder than normal for this time of year, so you might want a thin suit. The combined energy is a moderate 682, which is enough to get you moving. This is the standout—get in the water early.
Monday afternoon stays fun with 5ft and glassy conditions, but the swell starts to ease. Tuesday morning the 14th is still surfable with 3ft and glassy, but it’s nothing to write home about. From Tuesday afternoon right through to the end of the week, things get pretty ordinary. The swell drops right off, and the wind goes onshore or cross-shore, making for poor conditions. You’ll be looking at a gap of several days with no real recommendations.
The next flicker of hope comes Sunday the 21st with a glassy morning and 3ft, but it’s “surfable” at best. The real return of energy is on Monday the 27th of July. That morning session looks excellent again: 5ft of SSE groundswell with an 11-second period, glassy east winds, and combined energy of 647 (moderate). That’s the second standout of the window, and it’s a Monday. Keep an eye on it, but the long-range call is a bit less certain.
Tuesday the 28th holds some marginal 3ft swell, but it’s nothing special.
So, for the best waves, lock in Monday the 13th morning and Monday the 27th morning. The rest of the time, you’re waiting for the wind to play nice. Asakawa is an inconsistent point break, so this blank run isn’t too surprising.
Rusty.
Short Range ForecastMostly dry. Warm (max 32°C on Tue morning, min 27°C on Mon night). Wind will be generally light. | Days 4-6 Weather SummaryModerate rain (total 13mm), heaviest on Fri night. Warm (max 30°C on Thu morning, min 25°C on Sat night). Wind will be generally light. | ||||||||||||||||||||
Monday 13 | Tuesday 14 | Wednesday 15 | Thursday 16 | Friday 17 | Saturday 18 | Sunday 19 | |||||||||||||||
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 12 | SSW 11 | SSW 11 | SSW 10 | SSW 10 | SSW 9 | SSW 9 | SSW 9 | SSW 7 | SSW 8 | SSW 8 | SSW 7 | SSW 7 | SE 10 | SE 10 | SE 9 | ESE 12 | ESE 10 | ESE 9 | ESE 9 | SSE 9 |
Wave Graph  | |||||||||||||||||||||
 kJ | 658 | 447 | 292 | 209 | 157 | 86 | 84 | 86 | 38 | 95 | 64 | 42 | 27 | 15 | 15 | 20 | 53 | 151 | 101 | 65 | 29 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | glassy | glassy | off | glassy | on | glassy | glassy | cross-on | glassy | glassy | cross-on | glassy | cross | cross-on | glassy | cross-on | cross-on | on | on | on | glassy |
High Tide | 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 | 8:52AM1.63m | 9:39PM1.67m | ||||||||
Low Tide | 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 | 3:02AM0.69m | 3:11PM0.45m | ||||||||
 | |  |  | |  | | | | | | | |  |  | |  | | | | | |
 | 5:01 | — | — | 5:01 | — | — | 5:01 | — | — | 5:03 | — | — | 5:03 | — | — | 5:03 | — | — | 5:05 | — | — |
 | — | 7:14 | — | — | 7:14 | — | — | 7:13 | — | — | 7:13 | — | — | 7:12 | — | — | 7:12 | — | — | 7:12 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | 2 | 2 | 4 | 4 | 1 | — | — | — |
Temp °C | 31 | 31 | 29 | 32 | 31 | 28 | 31 | 30 | 28 | 30 | 30 | 28 | 30 | 30 | 27 | 27 | 26 | 25 | 28 | 27 | 26 |
Feels °C | 35 | 36 | 34 | 36 | 36 | 33 | 35 | 34 | 34 | 35 | 35 | 33 | 35 | 34 | 33 | 32 | 31 | 29 | 32 | 31 | 31 |
Swell 1 Height (m) Direction Period (s) | SSW 12 | SSW 11 | SSW 11 | SSW 10 | SSW 10 | SSW 9 | SSW 9 | SSW 9 | SSW 7 | SSW 8 | SSW 8 | SSW 7 | SSW 7 | SW 7 | SE 10 | SE 9 | ESE 12 | ESE 10 | ESE 9 | ESE 9 | SE 8 |
| kJ | 658 | 447 | 292 | 209 | 157 | 86 | 84 | 86 | 38 | 95 | 64 | 42 | 27 | 11 | 14 | 20 | 53 | 151 | 101 | 65 | 16 |
Swell 2 Height (m) Direction Period (s) | SE 10 | SE 10 | SE 10 | SE 12 | SE 12 | SE 11 | SE 11 | SE 10 | SSW 8 | SE 10 | SE 10 | ESE 10 | ESE 10 | SE 10 | SSW 7 | E 9 | E 9 | SSE 10 | SSE 10 | SSE 10 | SSE 9 |
| kJ | 17 | 17 | 27 | 36 | 36 | 31 | 29 | 28 | 37 | 14 | 15 | 18 | 18 | 15 | 11 | 15 | 14 | 18 | 18 | 19 | 29 |
Swell 3 Height (m) Direction Period (s) | SE 13 | E 9 | E 9 | E 9 | E 9 | E 10 | E 10 | SE 11 | SE 11 | ESE 10 | ESE 10 | SE 10 | SE 10 | S 8 | E 9 | SSW 7 | SSE 9 | SSW 7 | SW 7 | SW 7 | E 9 |
| kJ | 7 | 6 | 14 | 2 | 2 | 18 | 17 | 18 | 18 | 19 | 18 | 15 | 14 | 11 | 15 | 5 | 7 | 5 | 2 | 2 | 14 |
Wind waves Height (m) Direction Period (s) | — | — | — | NNE 3 | — | — | — | — | — | — | — | — | — | — | — | ESE 3 | SE 3 | ESE 4 | SE 4 | SE 4 | — |
| kJ | — | — | — | 3 | — | — | — | — | — | — | — | — | — | — | — | 2 | 1 | 16 | 9 | 8 | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 0 | 0 | 0 | 0 | 19 | 0 | 0 | 19 | 0 | 0 | 19 | 0 | 14 | 581 | 6 | 43 | 43 | 19 | 11 | 11 | 1 |
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.
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