Surf Forecasts:
Hanamizu River surf forecast from 6 Aug 2026:
- Best quality surf: Friday 7 Aug, 12AM (local time) - 6ft (1.9m), 14s period, S swell with glassy winds.
- Most powerful swell: Friday 7 Aug, 12AM (local time) - 6ft (1.9m), 14s period, S swell with 1,294 kJ wave energy.
- Next surfable swell (1★+): Friday 7 Aug, 12AM (local time) - 6ft (1.9m), 14s period with S 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 Friday (Aug 07) at 12AM. The primary swell is predicted to be 1.9m and 14s period with a secondary swell of 0.8m and 10s. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Hanamizu River in the next 16 days are 1.9m 14s and forecast to arrive on Friday (Aug 07) at 12AM. Winds are predicted to be glassy at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.5m 3s period and expected on Wednesday (Aug 12) at 3AM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 12AM (Fri 7th Aug) | 6ft (1.9m) 14s |
| Best Surf | 12AM (Fri 7th Aug) | 6ft (1.9m) 14s |
| Most Powerful | 12AM (Fri 7th Aug) | 6ft (1.9m) 14s |
Table - best surf conditions forecast for Hanamizu River over the next 16 days.
The Lowdown
Alright, Rusty here. Let’s break down what’s coming for your local spot.
We’re looking at a long stretch of almost nothing for Hanamizu River, with the first real chance of a session not showing up until way out there.
The first pulse of energy arrives on Thursday, August 6th, with a 1.8m S swell, a solid 13-second period, and combined energy at 1064 (moderate to strong). The water temp is 27°, right around average for the season. The snag is the wind – a light cross-onshore at 10 km/h, which puts a little ripple on the face. It’s a beginner-friendly height, but the quality is only marginal.
From the 7th through the 19th of August, it’s a tough run. The swell drops fast, and most days are either too small, cross-chopped, or just flat. Between the 7th and 10th, there’s some 1.0m to 1.5m swell, but the wind stays cross-onshore and the period shortens, so it’s messy. After the 10th, heights fall to 0.5m or less, and the energy numbers are in the double digits (weak). That’s a solid 12-day gap with nothing worth paddling out for.
The one bright spot is Friday, August 21st. The swell is still small – 0.6m from the S at 12 seconds – but the combined energy rises to 149 (moderate). The wind is glassy, dead calm from the E. That’s a gift. The 12-second period means long, clean lines with easy paddling. It’s small, but it’ll be pure. Crowds are listed as “sometimes,” so you might see a few others, but it won’t be packed.
That Friday morning is the only standout in the whole 16 days. For a spot that’s usually fairly consistent, this is a weird dry spell, but forecasts can always shift.
Rusty out.
Short Range ForecastMostly dry. Warm (max 29°C on Thu afternoon, min 25°C on Fri night). Wind will be generally light. | Days 5-7 Weather SummaryMostly dry. Warm (max 30°C on Tue morning, min 24°C on Mon night). Wind will be generally light. | |||||||||||||||||||
Thu 6 | Friday 7 | Saturday 8 | Sunday 9 | Monday 10 | Tuesday 11 | Wednesday 12 | ||||||||||||||
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) | S 13 | S 14 | S 13 | S 12 | S 11 | S 11 | S 11 | SSW 11 | S 10 | S 11 | S 10 | SSW 11 | SSW 11 | SSW 10 | SSW 11 | SSW 11 | SSW 11 | SSW 11 | SSW 11 | SW 11 |
Wave Graph  | ||||||||||||||||||||
 kJ | 1053 | 1294 | 810 | 625 | 426 | 302 | 247 | 198 | 102 | 82 | 78 | 93 | 88 | 62 | 70 | 69 | 71 | 70 | 47 | 21 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | glassy | on | cross-on | cross-on | on | cross-on | cross | cross-on | cross-on | glassy | cross | cross-on | cross-off | cross-off | cross | glassy | on | cross-on | cross-off |
High Tide | 9:05PM1.40m | 12:46PM1.07m | 9:50PM1.36m | 3:24PM1.19m | 11:07PM1.33m | 4:05PM1.31m | 00:49AM1.35m | 4:36PM1.39m | 2:12AM1.41m | 5:04PM1.45m | 3:16AM1.49m | 5:31PM1.47m | ||||||||
Low Tide | 4:53AM0.43m | 3:24PM1.05m | 6:23AM0.36m | 5:48PM1.18m | 7:47AM0.25m | 8:17PM1.17m | 8:52AM0.13m | 9:22PM1.10m | 9:44AM0.04m | 10:06PM0.99m | 10:28AM0.00m | 10:44PM0.87m | ||||||||
 |  | | | | | |  |  | | | | | | | | | | |  | |
 | — | — | 4:54 | — | — | 4:56 | — | — | 4:56 | — | — | 4:56 | — | — | 4:58 | — | — | 4:58 | — | — |
 | 6:42 | — | — | 6:40 | — | — | 6:39 | — | — | 6:38 | — | — | 6:37 | — | — | 6:37 | — | — | 6:36 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 1 |
Temp °C | 29 | 27 | 29 | 28 | 26 | 28 | 28 | 26 | 28 | 29 | 26 | 29 | 29 | 27 | 30 | 30 | 26 | 27 | 27 | 26 |
Feels °C | 32 | 32 | 32 | 30 | 29 | 30 | 30 | 29 | 31 | 31 | 29 | 29 | 30 | 27 | 28 | 29 | 27 | 28 | 28 | 28 |
Swell 1 Height (m) Direction Period (s) | S 13 | S 14 | S 13 | S 12 | S 11 | S 11 | S 11 | SSW 11 | S 10 | S 11 | S 10 | SSW 11 | SSW 11 | SSW 10 | SSW 11 | SSW 11 | SSW 11 | SSW 11 | SSW 11 | SSW 10 |
| kJ | 1053 | 1294 | 810 | 625 | 426 | 302 | 247 | 198 | 102 | 82 | 78 | 93 | 88 | 62 | 70 | 69 | 71 | 70 | 47 | 21 |
Swell 2 Height (m) Direction Period (s) | ESE 11 | ESE 10 | ESE 9 | SE 9 | SE 12 | ESE 11 | ESE 12 | ESE 12 | ESE 13 | ESE 13 | ESE 12 | ESE 12 | ESE 11 | ESE 11 | SW 12 | SE 13 | SE 13 | SE 12 | ESE 11 | SW 11 |
| kJ | 11 | 114 | 148 | 192 | 6 | 11 | 13 | 30 | 34 | 34 | 15 | 14 | 12 | 12 | 6 | 6 | 7 | 5 | 11 | 20 |
Swell 3 Height (m) Direction Period (s) | — | — | E 15 | SE 9 | E 15 | SE 12 | SE 12 | SE 12 | SW 12 | SW 12 | SW 12 | SE 11 | SE 11 | SE 14 | SE 12 | SW 12 | E 10 | S 10 | S 10 | ESE 11 |
| kJ | — | — | 4 | 21 | 4 | 6 | 6 | 5 | 21 | 6 | 23 | 4 | 5 | 7 | 6 | 6 | 2 | 2 | 2 | 11 |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | S 2 | — | — | — | — | — | — | NE 2 | NNE 3 | ENE 3 | NE 3 | NE 3 | NE 3 | NE 3 |
| kJ | — | — | — | — | — | — | 1 | — | — | — | — | — | — | 1 | 3 | 4 | 5 | 3 | 2 | 5 |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 59 | 0 | 62 | 62 | 62 | 31 | 36 | 12 | 19 | 36 | 0 | 27 | 34 | 12 | 123 | 444 | 0 | 27 | 69 | 12 |
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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