Surf Forecasts:
Hanamizu River surf forecast from 24 Aug 2026:
- Best quality surf: Monday 24 Aug, 6PM (local time) - 4.5ft (1.4m), 15s period, SSE swell with cross-offshore winds.
- Most powerful swell: Monday 24 Aug, 9PM (local time) - 5ft (1.5m), 14s period, SSE swell with 911 kJ wave energy.
- Next surfable swell (1★+): Monday 24 Aug, 6PM (local time) - 4.5ft (1.4m), 15s period with SSE swell.
Best Forecast Surf Conditions for Hanamizu River this week:
The surf forecast for Hanamizu River over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Monday (Aug 24) at 6PM. The primary swell is predicted to be 1.4m and 15s period with a secondary swell of 0.1m and 9s. Another secondary swell of 0.6m and 4s is also forecast. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at Hanamizu River in the next 16 days are 1.5m 14s and forecast to arrive on Monday (Aug 24) at 9PM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.8m 4s period and expected on Wednesday (Aug 26) at 6AM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 6PM (Mon 24th Aug) | 4.5ft (1.4m) 15s |
| Best Surf | 6PM (Mon 24th Aug) | 4.5ft (1.4m) 15s |
| Most Powerful | 9PM (Mon 24th Aug) | 5ft (1.5m) 14s |
Table - best surf conditions forecast for Hanamizu River over the next 16 days.
The Lowdown
Alright folks, Rusty here with the outlook for Hanamizu River. We’ve got a mixed bag coming up, but there are a couple of windows where it could be worth paddling out.
The first real shot of the period is on Monday, the 24th of August. The morning is where it’s at. We’re looking at a clean 2ft swell coming from the SSE with a very long period of 18 seconds – that’s proper groundswell energy, folks. The wind is glassy, absolute perfection for a beginner-friendly spot like this. The water is sitting at a warm 81°F, which is about average for this time of year, so no surprises there. The combined energy is moderate (477), which gives those long-period waves some push. Just keep in mind, that long period can make it break a bit straight on a beach/sandbar setup, but for a morning paddle on a small wave, it’s about as good as it gets. The crowds can be a factor here as it's sometimes busy, so get in early.
Monday afternoon, the wind swings onshore and the ocean gets choppy. That window slams shut pretty quick.
Tuesday morning, the 25th, we see a bump in size to 5ft from the SSE, but the wind is cross-shore with a bit of chop. It’s a marginal call. The energy jumps to moderate-high (766), but the conditions won't do it justice. Not a standout.
We then hit a long, dry spell. From Wednesday the 26th right through to the end of the month and into the first week of September, the surf just flatlines with small, weak pulses and mostly poor conditions. There are days with glassy conditions on the 29th and 30th, but the swell is tiny (1ft to 2ft) with weak energy in the double digits. Not worth your time.
There’s a glimmer of hope on Thursday the 3rd of September afternoon, when a 3ft SSW swell shows up with a period of 14 seconds and a clean cross-offshore wind. The energy climbs back into the moderate range (442). It’s still listed as a marginal call due to possible tide issues, but keep an eye on it. The following Friday morning the 4th looks similar with 3ft and clean wind from the NNE, but the forecast carries poor conditions despite the clean look.
After that, things get messy with storms and strong winds, and we finish the run into the second week with more small, weak surf. Honestly, nothing else stands out as a proper session.
The one true standout is Monday morning, 24 August at Hanamizu River. Get on it. The rest of the window is a waiting game with only a few marginal possibilities.
Rusty signing out.
Short Range ForecastSome drizzle, heaviest during Tue night. Warm (max 32°C on Tue afternoon, min 26°C on Mon night). Wind will be generally light. | Days 4-6 Weather SummaryHeavy rain (total 26mm), heaviest during Thu night. Warm (max 31°C on Thu morning, min 24°C on Thu night). Wind will be generally light. | ||||||||||||||||||||
Monday 24 | Tuesday 25 | Wednesday 26 | Thursday 27 | Friday 28 | Saturday 29 | Sunday 30 | |||||||||||||||
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) | SSE 18 | SSE 16 | SSE 14 | SSE 13 | SSE 12 | S 12 | SSW 12 | SSW 12 | SSW 12 | SSW 12 | SSW 11 | S 9 | S 9 | S 6 | S 6 | S 8 | SSW 8 | SSW 8 | SSW 8 | SSW 8 | SSW 8 |
Wave Graph  | |||||||||||||||||||||
 kJ | 260 | 480 | 615 | 690 | 298 | 319 | 236 | 217 | 123 | 90 | 47 | 62 | 55 | 43 | 39 | 33 | 22 | 13 | 14 | 13 | 13 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | glassy | cross-on | cross-off | cross | cross-off | cross-off | cross-on | cross-off | cross-off | cross | cross | cross | glassy | cross-off | off | cross-off | glassy | cross-off | cross | cross-on | cross-on |
High Tide | 4:23PM1.27m | 1:56AM1.27m | 4:35PM1.33m | 2:52AM1.35m | 4:51PM1.38m | 3:36AM1.42m | 5:08PM1.43m | 4:16AM1.47m | 5:27PM1.46m | 4:55AM1.50m | 5:46PM1.49m | 5:33AM1.50m | 6:05PM1.51m | ||||||||
Low Tide | 9:13PM1.05m | 9:21AM0.30m | 9:43PM0.96m | 9:55AM0.23m | 10:11PM0.85m | 10:25AM0.20m | 10:39PM0.74m | 10:54AM0.20m | 11:08PM0.63m | 11:22AM0.24m | 11:38PM0.52m | 11:50AM0.32m | 00:10AM0.43m | ||||||||
 | |  | | |  | | |  |  |  | | | | |  |  |  | | | | |
 | 5:07 | — | — | 5:09 | — | — | 5:09 | — | — | 5:09 | — | — | 5:11 | — | — | 5:11 | — | — | 5:13 | — | — |
 | — | 6:21 | — | — | 6:20 | — | — | 6:19 | — | — | 6:17 | — | — | 6:15 | — | — | 6:15 | — | — | 6:14 | — |
mm | — | — | — | — | — | 1 | — | — | — | — | 2 | 13 | — | — | 3 | 1 | 6 | 1 | — | — | — |
Temp °C | 28 | 29 | 27 | 31 | 32 | 27 | 30 | 31 | 28 | 31 | 31 | 25 | 27 | 29 | 27 | 27 | 25 | 24 | 27 | 26 | 25 |
Feels °C | 30 | 31 | 30 | 33 | 34 | 29 | 33 | 33 | 31 | 34 | 33 | 28 | 30 | 31 | 31 | 32 | 30 | 27 | 30 | 28 | 28 |
Swell 1 Height (m) Direction Period (s) | SSE 18 | SSE 13 | SSE 14 | SSE 13 | SSE 12 | S 12 | SSW 12 | SSW 12 | SSW 12 | S 5 | S 6 | S 9 | S 9 | S 8 | S 6 | S 8 | SSW 8 | SSW 8 | SSW 8 | SSW 8 | SSW 8 |
| kJ | 260 | 342 | 615 | 690 | 298 | 319 | 236 | 217 | 123 | 14 | 18 | 62 | 55 | 12 | 39 | 33 | 22 | 13 | 14 | 13 | 13 |
Swell 2 Height (m) Direction Period (s) | SSE 12 | SSE 16 | S 17 | E 14 | S 14 | E 13 | SSE 10 | SSE 9 | SSE 9 | SSW 12 | SSW 11 | SW 11 | SSE 9 | SSE 10 | SSE 9 | SSE 11 | SSE 11 | SSE 10 | SSE 10 | SSE 10 | SSE 10 |
| kJ | 133 | 480 | 351 | 4 | 187 | 3 | 52 | 48 | 31 | 90 | 47 | 18 | 8 | 9 | 9 | 11 | 12 | 11 | 10 | 10 | 10 |
Swell 3 Height (m) Direction Period (s) | SSE 15 | SW 8 | ESE 15 | ESE 14 | E 13 | ESE 13 | SSW 4 | E 12 | S 11 | SSE 9 | S 10 | SSE 10 | SW 10 | SW 10 | W 9 | SW 9 | SW 10 | SSW 9 | E 11 | SW 10 | SW 10 |
| kJ | 84 | 3 | 42 | 66 | 3 | 33 | 7 | 3 | 22 | 34 | 34 | 9 | 4 | 4 | 2 | 3 | 4 | 8 | 2 | 4 | 4 |
Wind waves Height (m) Direction Period (s) | — | S 3 | SSW 4 | SSW 4 | SSW 4 | SSW 5 | SW 4 | SSW 4 | SSW 5 | SSW 5 | — | — | — | S 6 | — | NE 2 | — | — | — | — | — |
| kJ | — | 5 | 10 | 6 | 43 | 25 | 15 | 25 | 37 | 21 | — | — | — | 43 | — | 1 | — | — | — | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 0 | 493 | 0 | 13 | 253 | 0 | 13 | 509 | 0 | 13 | 112 | 3 | 0 | 0 | 20 | 59 | 41 | 59 | 41 | 59 | 62 |
Best forecast wave conditions in Kanagawa | |||||||||||||||||||||
Best forecast wave conditions in Japan | |||||||||||||||||||||
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Information about the Hanamizu River Surf forecast
The above surf forecast table for Hanamizu River provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Hanamizu River can be found by selecting the local surf guide option on the grey menu. Our Hanamizu River 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 (Hanamizu River) 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 Hanamizu River 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.
Hanamizu River is 1 km (1 miles) from Ninomiya. If you plan a holiday in Kanagawa, look for hotels and other accommodation in Ninomiya. Ninomiya has rooms for a wide range of budgets as well as car hire and transport links.
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