
Surf Forecasts:
Wada Rivermouth surf forecast from 6 Aug 2026:
- Most powerful swell: Tuesday 11 Aug, 9PM (local time) - 2ft (0.6m), 3s period, ENE swell with 8 kJ wave energy.
Best Forecast Surf Conditions for Wada Rivermouth this week:
The most powerful waves expected at Wada Rivermouth in the next 16 days are 0.6m 3s and forecast to arrive on Tuesday (Aug 11) 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 1.9m 14s period and expected on Thursday (Aug 06) at 9PM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 9PM (Tue 11th Aug) | 2ft (0.6m) 3s |
Table - best surf conditions forecast for Wada Rivermouth over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let's take a hard look at this stretch. I've got the goods from the data, and I'm calling it straight.
To be brutally honest, the next 16 days are looking dead flat for any kind of real surf action. We've got a long run of nothing. From Thursday 6th August right through to Friday 21st August, the energy just isn't there. The combined swell energy sits at a pathetic 0 (zero) for the vast majority of the period, and when a whisper of a wave does show up, it's tiny, wind-affected junk. We're talking about a gap of over two weeks with absolutely no worthwhile surf on offer.
Let's break down why. Looking at the only option in the guidance, Wada Rivermouth, it’s a sheltered river-mouth setup that ideally wants a northerly swell. Problem is, we aren’t seeing any. The swell is coming from the east and northeast, which is completely wrong for this place. The wind is also a mess, mostly cross or cross-on, messing up any chance of a clean face.
On the 7th of August, Friday morning, there's a tiny 0.3 ft easterly swell with a long 15-second period, but the wind is onshore and we have the risk of thunderstorms. Combined energy is a pathetic 4. That’s not surf; that’s a ripple. On the 8th, Saturday afternoon, we get 1.0 ft of south swell with a period of just 2 seconds—essentially wind chop—and combined energy of 1. Later in the week, on Tuesday the 11th, we see a clean offshore wind from the NNE (19 mph), but again, zero swell energy. Clean wind on a flat ocean doesn't make waves.
For the rest of the window, into the second week, it’s the same story. A few readings show 1.0 ft or 1 ft of swell from the NE or E, but the period is a dreadful 2-3 seconds. That’s just bumpy water. The combined energy never breaks out of the single digits. Water temp is sitting around 79°, which is about average for the time of year over the first day, but you won't be swimming for waves.
Honestly, this is a blank run. For an area like this, a dead spell is not unusual, but it's frustrating. Don't bother paddling out for the next two weeks. The forecasts can change, but right now, it's a write-off for any sort of wave riding. You could maybe take a kite out if the wind is strong and cross, but for a surfboard, there's nothing doing.
This is Rusty, signing off. Keep your wax dry.
Short Range ForecastLight rain (total 3mm), mostly falling on Thu night. Warm (max 28°C on Thu afternoon, min 24°C on Sat night). Wind will be generally light. | Days 5-7 Weather SummaryMostly dry. Warm (max 29°C on Mon morning, min 22°C on Sun night). Winds decreasing (fresh winds from the NNE on Tue morning, light winds from the NNE by Tue night). | |||||||||||||||||||
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 | E 15 | S 12 | E 15 | S 11 | S 2 | SSW 11 | S 10 | S 11 | S 10 | SSW 11 | SSW 11 | NE 2 | SSW 11 | ENE 3 | NE 3 | NE 3 | NE 3 | NE 3 |
Wave Graph | ||||||||||||||||||||
0 | 0 | 4 | 0 | 4 | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 4 | 5 | 3 | 2 | 5 | |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-on | on | on | on | on | on | glassy | cross-on | cross-on | cross-off | cross | cross | cross-off | cross-off | cross | cross-off | cross | cross-on | cross-off |
High Tide | 8:50PM1.35m | 12:53PM1.01m | 9:33PM1.32m | 10:44PM1.30m | 4:10PM1.24m | 00:26AM1.31m | 4:34PM1.31m | 1:52AM1.36m | 4:59PM1.35m | 2:58AM1.43m | 5:23PM1.37m | |||||||||
Low Tide | 4:43AM0.41m | 2:39PM1.00m | 6:14AM0.34m | 7:37AM0.23m | 7:51PM1.16m | 8:41AM0.12m | 9:03PM1.09m | 9:33AM0.04m | 9:48PM0.99m | 10:17AM0.01m | 10:27PM0.87m | |||||||||
— | — | 4:52 | — | — | 4:54 | — | — | 4:54 | — | — | 4:54 | — | — | 4:56 | — | — | 4:56 | — | — | |
6:38 | — | — | 6:37 | — | — | 6:37 | — | — | 6:36 | — | — | 6:35 | — | — | 6:34 | — | — | 6:32 | — | |
mm | — | 2 | 1 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 12 |
Temp °C | 28 | 26 | 28 | 28 | 26 | 28 | 28 | 25 | 27 | 27 | 24 | 29 | 29 | 24 | 29 | 29 | 24 | 26 | 27 | 23 |
Feels °C | 31 | 30 | 31 | 30 | 29 | 31 | 30 | 29 | 30 | 28 | 26 | 27 | 27 | 23 | 28 | 28 | 24 | 27 | 28 | 24 |
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 |
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 |
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 |
— | — | 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 |
— | — | — | — | — | — | 1 | — | — | — | — | — | — | 1 | 3 | 4 | 5 | 3 | 2 | 5 | |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 15 | 15 | 47 | 47 | 47 | 15 | 47 | 8 | 15 | 17 | 15 | 17 | 15 | 80 | 168 | 498 | 15 | 15 | 17 | 39 |
Best forecast wave conditions in Chiba | ||||||||||||||||||||
Best forecast wave conditions in Japan | ||||||||||||||||||||
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Information about the Wada Rivermouth Surf forecast
The above surf forecast table for Wada Rivermouth provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Wada Rivermouth can be found by selecting the local surf guide option on the grey menu. Our Wada Rivermouth 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 (Wada Rivermouth) 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 Wada Rivermouth 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.
Wada Rivermouth is 11 km (7 miles) from Tateyama. If you plan a holiday in Chiba, look for hotels and other accommodation in Tateyama. Tateyama has rooms for a wide range of budgets as well as car hire and transport links.











