Surf Forecasts:
Hanamizu River surf forecast from 4 Aug 2026:
- Best quality surf: Friday 7 Aug, 6AM (local time) - 7ft (2.2m), 15s period, S swell with cross-offshore winds.
- Most powerful swell: Wednesday 5 Aug, 12PM (local time) - 7.5ft (2.3m), 15s period, SSE swell with 2,432 kJ wave energy.
- Next surfable swell (1★+): Friday 7 Aug, 6AM (local time) - 7ft (2.2m), 15s 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 6AM. The primary swell is predicted to be 2.2m and 15s period with a secondary swell of 1.0m and 10s. 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 2.3m 15s and forecast to arrive on Wednesday (Aug 05) at 12PM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.9m 4s period and expected on Wednesday (Aug 05) at 6AM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 6AM (Fri 7th Aug) | 7ft (2.2m) 15s |
| Best Surf | 6AM (Fri 7th Aug) | 7ft (2.2m) 15s |
| Most Powerful | 12PM (Wed 5th Aug) | 7.5ft (2.3m) 15s |
Table - best surf conditions forecast for Hanamizu River over the next 16 days.
The Lowdown
Alright, this is a bit of a tough one for us here at Hanamizu River. The swell is coming in from the SE and SSE, which is our optimum direction, but the energy is just not there for a clean, rippable wave for most of the coming days.
We’re starting off with some moderate wave energy (1098) on Tuesday morning, with a clean 5ft swell from the SE. The water is a touch warmer than normal at 82°, so that’s a nice bonus. But the wind is a moderate cross-off from the NE, which is okay, but the whole forecast is littered with “marginal” comments. The tide and conditions just aren't playing ball. The afternoon turns into a cross-on mess, so don't bother.
Wednesday morning sees the swell bump up to 7ft from the SSE, with a long period of 16 seconds. The energy jumps right up (2379). The wind is a cross-off from the NNE, which is clean. This is the best we’ll see all week. If you’re an experienced surfer, this is your window. That 7ft is pushing it for beginners, but the long period (15 seconds+) will be drawing lines, so watch for it to break a bit fat on the sandbar. Thursday and Friday have similar swell sizes, but the wind switches around, getting cross-shore and onshore, which will chop things up.
The real problem is this: from Saturday the 10th, the swell just drops off a cliff. We get a few days of minimal energy, and by the 12th of August, the energy is in the low hundreds (186, 168). The forecast shows poor surf conditions for days on end with light rain and strong breezes. It’s a total write-off. The second week, from the 12th to the 19th, is just flat. The energy is weak, the swell is tiny, and the wind is mostly cross-off, but there’s no wave to ride.
So, if you’re a local, get out on Wednesday morning the 5th of August. That’s your one shot. After that, it’s a long, dry spell. For the rest of us, it’s time to take a break, check the forecast again next week, and hope something changes. The only consistent thing here is the inconsistency.
Rusty
Short Range ForecastLight rain (total 4mm), mostly falling on Thu afternoon. Warm (max 30°C on Thu morning, min 23°C on Tue night). Wind will be generally light. | Days 4-6 Weather SummaryLight rain (total 2mm), mostly falling on Fri night. Warm (max 30°C on Sun afternoon, min 23°C on Sun night). Wind will be generally light. | ||||||||||||||||||||
Tuesday 4 | Wednesday 5 | Thursday 6 | Friday 7 | Saturday 8 | Sunday 9 | Monday 10 | |||||||||||||||
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) | SE 17 | SE 16 | SE 16 | SSE 16 | SSE 15 | SSE 14 | SSE 14 | S 14 | S 14 | S 15 | S 15 | SSW 14 | SSW 14 | SSW 14 | SSW 14 | SSW 14 | SSW 14 | SSW 16 | SSW 16 | SSW 16 | SW 15 |
Wave Graph  | |||||||||||||||||||||
 kJ | 1094 | 1464 | 2107 | 2379 | 2414 | 1835 | 1665 | 2012 | 1972 | 1881 | 1739 | 1189 | 1060 | 1030 | 874 | 899 | 534 | 674 | 499 | 425 | 171 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross-on | cross-off | cross-off | cross-on | cross | cross | on | cross | cross | on | glassy | cross-on | cross-on | glassy | cross | cross-on | cross-off | cross-off | cross-off | cross-off |
High Tide | 8:05PM1.45m | 8:47AM1.18m | 8:33PM1.43m | 10:12AM1.09m | 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 | ||||||||
Low Tide | 1:44PM0.55m | 2:41AM0.50m | 2:14PM0.72m | 3:38AM0.47m | 2:45PM0.88m | 4:53AM0.43m | 3:24PM1.05m | 6:23AM0.36m | 5:48PM1.18m | 7:47AM0.25m | 8:17PM1.17m | 8:52AM0.13m | 9:22PM1.10m | ||||||||
 | |  |  | | | |  |  | | | | | |  | | | | | | | |
 | 4:52 | — | — | 4:54 | — | — | 4:54 | — | — | 4:54 | — | — | 4:56 | — | — | 4:56 | — | — | 4:56 | — | — |
 | — | 6:44 | — | — | 6:43 | — | — | 6:42 | — | — | 6:40 | — | — | 6:39 | — | — | 6:38 | — | — | 6:37 | — |
mm | — | — | — | — | — | — | — | 1 | 3 | — | — | 1 | — | — | 1 | — | — | — | — | — | 1 |
Temp °C | 28 | 29 | 24 | 28 | 29 | 27 | 30 | 30 | 27 | 29 | 29 | 27 | 28 | 29 | 26 | 29 | 30 | 26 | 28 | 29 | 25 |
Feels °C | 26 | 27 | 23 | 28 | 30 | 29 | 33 | 33 | 32 | 31 | 32 | 31 | 31 | 31 | 31 | 29 | 30 | 25 | 25 | 26 | 22 |
Swell 1 Height (m) Direction Period (s) | SE 17 | SE 16 | SE 16 | SSE 16 | SSE 15 | SSE 14 | SSE 14 | S 14 | S 14 | S 15 | S 15 | SSW 14 | SSW 14 | SSW 14 | SSW 14 | SSW 14 | SSW 14 | SSW 16 | SSW 16 | SSW 16 | SW 15 |
| kJ | 1094 | 1464 | 2107 | 2379 | 2414 | 1835 | 1665 | 2012 | 1972 | 1881 | 1739 | 1189 | 1060 | 1030 | 874 | 899 | 534 | 674 | 499 | 425 | 171 |
Swell 2 Height (m) Direction Period (s) | E 14 | E 13 | — | — | — | — | E 10 | ESE 10 | ESE 10 | ESE 10 | SE 9 | SE 9 | ESE 12 | ESE 12 | ESE 12 | ESE 16 | SW 16 | SE 8 | SE 8 | SE 8 | S 13 |
| kJ | 4 | 3 | — | — | — | — | 53 | 114 | 111 | 151 | 263 | 297 | 13 | 14 | 30 | 48 | 267 | 35 | 17 | 10 | 125 |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | E 15 | SE 17 | ESE 16 | SSE 8 | — | SSE 9 | ESE 13 | ESE 13 | S 13 | ESE 13 |
| kJ | — | — | — | — | — | — | — | — | — | — | — | 4 | 12 | 25 | 114 | — | 31 | 17 | 18 | 31 | 17 |
Wind waves Height (m) Direction Period (s) | NNE 3 | — | — | NNE 4 | — | — | — | — | — | — | — | — | — | — | — | — | SE 9 | ENE 3 | NE 4 | NE 3 | NNE 4 |
| kJ | 7 | — | — | 22 | — | — | — | — | — | — | — | — | — | — | — | — | 110 | 2 | 10 | 7 | 10 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 123 | 36 | 465 | 463 | 33 | 10 | 23 | 33 | 10 | 10 | 36 | 0 | 33 | 36 | 0 | 10 | 33 | 1015 | 2050 | 2039 | 112 |
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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