Surf Forecasts:
Big Ben surf forecast from 1 Sep 2026:
- Best quality surf: Tuesday 8 Sep, 3AM (local time) - 10ft (3.0m), 10s period, SSE swell with glassy winds.
- Most powerful swell: Tuesday 8 Sep, 3PM (local time) - 13ft (4.0m), 11s period, SSE swell with 3,289 kJ wave energy.
- Next surfable swell (1★+): Wednesday 2 Sep, 3AM (local time) - 3.5ft (1.0m), 11s period with E 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 02) at 3AM. The primary swell is predicted to be 1.0m and 11s period with a secondary swell of 0.7m and 7s. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Big Ben in the next 16 days are 4.0m 11s and forecast to arrive on Tuesday (Sep 08) at 3PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.7m 4s period and expected on Friday (Sep 04) at 12PM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 3AM (Wed 2nd Sep) | 3.5ft (1.0m) 11s |
| Best Surf | 3AM (Tue 8th Sep) | 10ft (3.0m) 10s |
| Most Powerful | 3PM (Tue 8th Sep) | 13ft (4.0m) 11s |
Table - best surf conditions forecast for Big Ben over the next 16 days.
The Lowdown
Alright, folks, Rusty here. Let's break down the next couple of weeks. The short-term is a bit of a bummer. We've got some small, weak swells rolling in, but the winds are mostly onshore or cross-shore, and the wave energy is barely ticking over – mostly in the low hundreds. You're looking at messy, weak 3ft to 5ft waves for the first week, and the scores are low for a reason. The water temp is sitting at 83°, which is a touch warmer than normal for this time of year, so at least it's not cold.
Tuesday the 1st starts us off with a tiny 3ft ESE swell at 12 seconds at Big Ben, but with a cross-wind and a combined energy of only 330, it's honestly not worth a paddle. The whole first week drags by – through Wednesday the 2nd, Thursday the 3rd, Friday the 4th, Saturday the 5th, and Sunday the 6th – all with weak, onshore-influenced slop barely breaking. There's a stretch from the 3rd to the 7th where conditions are consistently poor, with rain and light chop. It's grim.
Then we hit Monday the 7th. There's a little pulse, with 6ft of swell from the East at 7 seconds on that afternoon, and combined energy bumps up to 458. The wind goes light and cross-off, so the surface cleans right up. It's still a short-period windswell, so not the best shape, but it's the first sign of life. The score for the morning was a 2, but the afternoon was the same, so it's a minor pick-up.
But hold onto your boards, because Tuesday the 8th is where things get interesting. The early morning at Big Ben is flat calm – glassy, with no wind. A solid 10ft swell from the SSE at 10 seconds has turned up, and the combined energy is a whopping 1779. The only problem? That 10ft is way too big for this beginner-friendly beach/jetty break. It's a stand-out for size and conditions, but only for experts, and if you're not one, give it a miss. The afternoon only gets bigger, with 13ft. Wednesday the 9th is even more massive – 15ft in the morning and 13ft in the afternoon, with 12-second periods and energy soaring over 5000. Again, cleanest conditions, but all of it is for experts only at Big Ben.
From Thursday the 10th through to Saturday the 12th, the onshore winds blow hard again – 18-28 mph straight on – and the ocean will be a mess despite the 10ft to 7ft swell. Don't bother.
Sunday the 13th and Monday the 14th see the size hang around the 7ft to 8ft mark, but the cross-onshore winds chop it all up. Not great.
Then Tuesday the 15th delivers a monster: a 20ft ESE swell with a long 14-second period, and an incredible 13605 combined energy. But it's under a storm risk and cross-onshore winds, so while the raw power is insane, the conditions are foul.
The best window actually looks like the tail end. Wednesday the 16th is your true standout. The morning has a 6ft swell from the East at 14 seconds, with moderate cross-shore winds. The combined energy is still high at 2822, but the size is back into a manageable range. That's a long-period groundswell, which means proper lines and shape, especially for a beach/jetty like this. The water's clean, the wind's not terrible, and it's the best balance of power and surfability in the whole forecast.
Rusty.
Short Range ForecastModerate rain (total 17mm), heaviest on Thu night. Warm (max 28°C on Wed morning, min 21°C on Thu night). Wind will be generally light. | Days 4-6 Weather SummaryHeavy rain (total 186mm), heaviest during Fri afternoon. Warm (max 24°C on Sun night, min 19°C on Fri night). Winds increasing (light winds from the NE on Fri morning, fresh winds from the NNE by Sun morning). | ||||||||||||||||||||
Tuesday 1 | Wednesday 2 | Thursday 3 | Friday 4 | Saturday 5 | Sunday 6 | Monday 7 | |||||||||||||||
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) | ESE 12 | E 11 | E 11 | E 10 | E 10 | E 11 | E 10 | E 10 | E 10 | E 9 | SE 7 | SSW 9 | SSW 8 | SSW 8 | SW 10 | ENE 6 | ENE 6 | ENE 6 | ENE 7 | E 7 | SSE 10 |
Wave Graph | |||||||||||||||||||||
228 | 295 | 335 | 247 | 192 | 191 | 125 | 94 | 92 | 106 | 189 | 151 | 101 | 76 | 50 | 148 | 190 | 197 | 335 | 348 | 1087 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross-on | cross | cross-on | on | cross-on | cross-on | cross | off | cross | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross | cross-off | cross-off | cross-off |
High Tide | 6:45PM1.54m | 7:47AM1.35m | 7:06PM1.51m | 8:45AM1.23m | 7:27PM1.48m | 10:29AM1.12m | 7:48PM1.43m | 8:08PM1.35m | 3:59PM1.32m | 10:09PM1.26m | 3:49PM1.38m | 1:09AM1.28m | |||||||||
Low Tide | 12:48PM0.68m | 1:22AM0.41m | 1:09PM0.82m | 2:05AM0.43m | 1:26PM0.96m | 3:00AM0.47m | 1:21PM1.08m | 4:21AM0.52m | 6:15AM0.51m | 8:43PM1.26m | 7:44AM0.44m | 8:59PM1.14m | |||||||||
5:11 | — | — | 5:11 | — | — | 5:11 | — | — | 5:13 | — | — | 5:13 | — | — | 5:13 | — | — | 5:15 | — | — | |
— | 6:07 | — | — | 6:06 | — | — | 6:04 | — | — | 6:02 | — | — | 6:01 | — | — | 6:00 | — | — | 5:59 | — | |
mm | — | — | — | — | — | 1 | 5 | 1 | 10 | 22 | 68 | 41 | 3 | 1 | — | 2 | 4 | 45 | 3 | 2 | 16 |
Temp °C | 26 | 26 | 25 | 28 | 28 | 26 | 28 | 27 | 24 | 23 | 21 | 20 | 21 | 23 | 23 | 21 | 22 | 24 | 24 | 24 | 24 |
Feels °C | 27 | 27 | 28 | 31 | 31 | 30 | 32 | 30 | 26 | 25 | 19 | 17 | 20 | 21 | 21 | 18 | 20 | 25 | 25 | 27 | 28 |
Swell 1 Height (m) Direction Period (s) | ESE 12 | E 11 | E 11 | E 10 | E 10 | E 11 | E 10 | E 10 | SE 6 | SE 7 | SE 7 | SSW 9 | SSW 8 | SSW 8 | SE 8 | SE 8 | SE 7 | SE 7 | SE 8 | S 9 | SSE 10 |
228 | 295 | 335 | 247 | 192 | 191 | 125 | 94 | 60 | 105 | 189 | 151 | 101 | 76 | 39 | 45 | 59 | 91 | 226 | 64 | 1087 | |
Swell 2 Height (m) Direction Period (s) | ENE 8 | ENE 7 | SSW 8 | SSW 8 | E 13 | ENE 7 | S 9 | S 8 | E 10 | SSW 10 | SSW 10 | E 9 | E 9 | SE 8 | SW 10 | SW 9 | SW 8 | SW 10 | S 10 | SE 9 | E 7 |
88 | 47 | 14 | 24 | 83 | 29 | 71 | 52 | 92 | 77 | 72 | 127 | 76 | 45 | 50 | 41 | 11 | 15 | 33 | 43 | 134 | |
Swell 3 Height (m) Direction Period (s) | SSW 8 | SSW 8 | SE 10 | SE 10 | SSW 8 | S 9 | ENE 7 | SE 6 | SSW 11 | ENE 15 | E 9 | SE 8 | SE 7 | E 9 | SSW 7 | E 8 | ESE 11 | SE 11 | ESE 11 | SW 9 | E 18 |
14 | 14 | 15 | 16 | 28 | 38 | 15 | 20 | 51 | 21 | 41 | 45 | 41 | 38 | 16 | 13 | 12 | 19 | 12 | 3 | 6 | |
Wind waves Height (m) Direction Period (s) | — | — | NE 7 | — | — | — | — | — | — | E 9 | — | — | ESE 7 | NE 3 | ENE 5 | ENE 6 | ENE 6 | ENE 6 | ENE 7 | E 7 | — |
— | — | 47 | — | — | — | — | — | — | 106 | — | — | 70 | 2 | 46 | 148 | 190 | 197 | 335 | 348 | — | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 22 | 22 | 6 | 35 | 30 | 30 | 30 | 24 | 0 | 6 | 177 | 184 | 62 | 1521 | 595 | 513 | 513 | 273 | 177 | 0 | 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.











