
Surf Forecasts:
Big Ben surf forecast from 8 Sep 2026:
- Best quality surf: Wednesday 9 Sep, 9PM (local time) - 8ft (2.4m), 9s period, SSW swell with cross-offshore winds.
- Most powerful swell: Wednesday 9 Sep, 9PM (local time) - 8ft (2.4m), 9s period, SSW swell with 921 kJ wave energy.
- Next surfable swell (1★+): Wednesday 9 Sep, 9PM (local time) - 8ft (2.4m), 9s period with SSW swell.
Best Forecast Surf Conditions for Big Ben this week:
The surf forecast for Big Ben over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Wednesday (Sep 09) at 9PM. The primary swell is predicted to be 2.4m and 9s period with a secondary swell of 2.0m and 9s. Another secondary swell of 0.3m and 9s is also forecast. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at Big Ben in the next 16 days are 2.4m 9s and forecast to arrive on Wednesday (Sep 09) at 9PM. Winds are predicted to be cross-offshore at the time the swell arrives.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 9PM (Wed 9th Sep) | 8ft (2.4m) 9s |
| Best Surf | 9PM (Wed 9th Sep) | 8ft (2.4m) 9s |
| Most Powerful | 9PM (Wed 9th Sep) | 8ft (2.4m) 9s |
Table - best surf conditions forecast for Big Ben over the next 16 days.
The Lowdown
Alright folks, Rusty here with a look at the next couple of weeks for Big Ben. This one’s a real rollercoaster – got a solid enough opener, but a whole lot of flat and ugly in the middle before a monster finishes the run.
We start off Tuesday the 8th with a bit of a so-so kick-off. Swell is running about 6ft from the south with a 9 second period, but the wind is a cross-shore from the southwest at 9 mph, putting a bit of a chop on it. The combined energy is moderate at 680, but the report says it’s marginal. The water temp is sitting at 28°, which is a touch warmer than normal for this time of year, so you can leave the steamer at home.
Honestly, the best stuff on offer in this opening run is Thursday the 10th. The swell drops back to a clean 5ft from the south, but more importantly, we get those clean cross-offshore winds from the NNE at 12 mph. It’s not huge, but it’s clean, and the combined energy is still moderate at 515. This is your call to get a session in before it all gets messy.
Things get a bit weird on Friday the 11th. The swell bottoms right out to a tiny 2ft, but from the east with a super long period of 14 seconds. With that light NNE wind at 6 mph, it’s clean as a whistle (combined energy 388). That long period will hold it up, but it’s very small and inconsistent, so expect to work for the few decent runners that come through.
From Saturday the 12th right through to Wednesday the 18th, it’s a pretty grim stretch. The swell stays tiny (under 3ft), period drops, and the wind is rarely in our favour. There are days with clean conditions but no push, and days with some push but onshore or strong cross-shore wind. This is a proper gap where you’re better off cleaning the wax off your boards. Combined energy readings sit under 500 for the most part, dropping to a weak 92 by the 18th.
Mark your calendars for Sunday the 20th because that’s when the rug gets pulled. A massive SE groundswell starts to fill in, hitting 8ft on Sunday morning with a very long 18 second period. The combined energy rockets to a massive 3843, and with a light ENE cross-shore, it’s just getting started. But the afternoon is the real headline: a solid 10ft from the SE (6525 combined energy). Now, the report flags this as too big for this break, and the wind swings onshore from the SE at 9 mph. This is expert territory only. If you’re not a seasoned charger on a step-up, stay on the beach and watch.
Monday the 21st is just pure, raw power. 13ft – 15ft of SSE groundswell with that same 18 second period. The combined energy is off the charts, hitting 14050. The wind is clean off the land from the NNW, but it’s a near gale at 31 mph. It’s going to be massive, dangerous, and for the absolute elite only. Even Tuesday the 22nd sees a glassy 13ft from the SE (9879 combined energy) – still way too big for a standard paddle.
After that big pulse, it settles down, but the wind picks up again from the NE, making for some lumpy, cross-shore conditions.
So, if you’re looking for the standout sessions: go for Thursday the 10th morning for a clean, fun wave, or if you’re an absolute beast, watch the swell from Sunday the 20th but be prepared for serious size.
Stay safe out there.
Rusty.
Short Range ForecastHeavy rain (total 25mm), heaviest during Wed night. Warm (max 29°C on Tue morning, min 19°C on Thu afternoon). Winds decreasing (fresh winds from the SW on Tue night, light winds from the NNE by Thu night). | Days 4-6 Weather SummarySome drizzle, heaviest during Sun night. Warm (max 26°C on Sun morning, min 20°C on Fri morning). Wind will be generally light. | ||||||||||||||||||||
Tuesday 8 | Wednesday 9 | Thursday 10 | Friday 11 | Saturday 12 | Sunday 13 | Monday 14 | |||||||||||||||
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) | S 9 | S 9 | S 9 | SSW 8 | SSW 9 | S 9 | S 8 | S 8 | NE 8 | E 14 | E 14 | E 14 | E 14 | E 13 | E 13 | E 13 | E 13 | E 12 | ESE 10 | ESE 9 | E 14 |
Wave Graph | |||||||||||||||||||||
580 | 459 | 668 | 787 | 738 | 487 | 273 | 235 | 200 | 144 | 140 | 183 | 180 | 289 | 361 | 272 | 276 | 236 | 307 | 272 | 246 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross | cross | cross | cross | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross | cross | cross | cross-off | cross | cross-on | glassy | glassy | on | glassy |
High Tide | 4:00PM1.44m | 2:25AM1.38m | 4:17PM1.48m | 3:18AM1.48m | 4:35PM1.51m | 4:02AM1.57m | 4:53PM1.53m | 4:42AM1.62m | 5:12PM1.55m | 5:20AM1.63m | 5:30PM1.56m | 5:58AM1.59m | 5:50PM1.57m | ||||||||
Low Tide | 9:23PM1.01m | 9:23AM0.31m | 9:48PM0.87m | 9:59AM0.30m | 10:15PM0.72m | 10:31AM0.32m | 10:42PM0.59m | 11:01AM0.38m | 11:11PM0.48m | 11:29AM0.47m | 11:41PM0.39m | 11:55AM0.58m | 00:13AM0.33m | ||||||||
5:16 | — | — | 5:16 | — | — | 5:16 | — | — | 5:18 | — | — | 5:18 | — | — | 5:20 | — | — | 5:20 | — | — | |
— | 5:57 | — | — | 5:55 | — | — | 5:54 | — | — | 5:52 | — | — | 5:52 | — | — | 5:50 | — | — | 5:49 | — | |
mm | — | — | 7 | 2 | 2 | 10 | — | — | 4 | — | — | — | — | — | — | — | — | 1 | — | — | — |
Temp °C | 29 | 29 | 27 | 29 | 28 | 23 | 20 | 20 | 20 | 21 | 22 | 21 | 23 | 23 | 22 | 26 | 26 | 25 | 27 | 27 | 25 |
Feels °C | 31 | 31 | 29 | 29 | 29 | 25 | 19 | 19 | 19 | 23 | 25 | 23 | 25 | 24 | 24 | 29 | 29 | 29 | 30 | 30 | 29 |
Swell 1 Height (m) Direction Period (s) | S 9 | S 9 | E 8 | ESE 10 | ESE 10 | S 9 | S 8 | S 8 | S 8 | S 8 | S 7 | SSW 7 | S 7 | E 13 | E 13 | E 13 | E 13 | E 12 | ESE 10 | ESE 9 | ESE 9 |
580 | 459 | 34 | 55 | 38 | 487 | 273 | 235 | 156 | 122 | 108 | 73 | 54 | 289 | 361 | 272 | 276 | 236 | 307 | 272 | 211 | |
Swell 2 Height (m) Direction Period (s) | E 9 | E 9 | SE 10 | E 17 | E 16 | E 16 | E 15 | E 15 | NE 8 | E 14 | NE 7 | E 14 | E 14 | S 7 | SSW 7 | SE 9 | SE 8 | SE 9 | E 12 | E 12 | E 14 |
73 | 73 | 24 | 52 | 46 | 43 | 68 | 67 | 129 | 144 | 54 | 183 | 180 | 39 | 16 | 50 | 68 | 104 | 107 | 72 | 246 | |
Swell 3 Height (m) Direction Period (s) | SE 10 | SE 10 | E 18 | SE 12 | NE 8 | ESE 11 | ESE 11 | SE 11 | E 14 | SE 10 | E 14 | SE 10 | ESE 9 | NE 6 | SSW 7 | SSW 7 | SSW 7 | NE 6 | E 16 | E 14 | NE 8 |
27 | 27 | 25 | 6 | 3 | 22 | 11 | 29 | 100 | 24 | 140 | 24 | 32 | 9 | 19 | 9 | 5 | 6 | 45 | 107 | 11 | |
Wind waves Height (m) Direction Period (s) | — | — | S 9 | SSW 8 | SSW 9 | NE 7 | NE 7 | NE 7 | NE 8 | ENE 8 | — | ENE 7 | — | NE 3 | NE 6 | NE 6 | NE 6 | — | — | — | — |
— | — | 668 | 787 | 738 | 169 | 163 | 143 | 200 | 98 | — | 31 | — | 1 | 13 | 13 | 19 | — | — | — | — | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 35 | 30 | 81 | 798 | 90 | 273 | 22 | 90 | 22 | 0 | 0 | 6 | 6 | 35 | 0 | 6 | 22 | 0 | 0 | 30 | 0 |
Best forecast wave conditions in Chiba | |||||||||||||||||||||
Best forecast wave conditions in Japan | |||||||||||||||||||||
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Information about the Big Ben Surf forecast
The above surf forecast table for Big Ben provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Big Ben can be found by selecting the local surf guide option on the grey menu. Our Big Ben 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 (Big Ben) 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 Big Ben 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.
Big Ben is 3 km (2 miles) from Kawaguchi. If you plan a holiday in Chiba, look for hotels and other accommodation in Kawaguchi. Kawaguchi has rooms for a wide range of budgets as well as car hire and transport links.










