
Surf Forecasts:
Big Ben surf forecast from 4 Sep 2026:
- Best quality surf: Sunday 6 Sep, 6PM (local time) - 10ft (3.0m), 8s period, E swell with cross-shore winds.
- Most powerful swell: Monday 7 Sep, 3PM (local time) - 15ft (4.5m), 11s period, S swell with 4,922 kJ wave energy.
- Next surfable swell (1★+): Sunday 6 Sep, 6PM (local time) - 10ft (3.0m), 8s 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 Sunday (Sep 06) at 6PM. The primary swell is predicted to be 3.0m and 8s period with a secondary swell of 0.4m and 7s. Another secondary swell of 0.3m and 9s is also forecast. The wind is predicted to be cross-shore as the swell arrives.
The most powerful waves expected at Big Ben in the next 16 days are 4.5m 11s and forecast to arrive on Monday (Sep 07) at 3PM. Winds are predicted to be offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.8m 5s period and expected on Wednesday (Sep 09) at 3AM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 6PM (Sun 6th Sep) | 10ft (3.0m) 8s |
| Best Surf | 6PM (Sun 6th Sep) | 10ft (3.0m) 8s |
| Most Powerful | 3PM (Mon 7th Sep) | 15ft (4.5m) 11s |
Table - best surf conditions forecast for Big Ben over the next 16 days.
The Lowdown
Alright, this is Rusty comin' at ya with a look at what's on the menu for the next couple of weeks. Gotta be straight with you from the jump – this one's a bit of a mixed bag, and there's a lot of waiting involved.
We're looking at Big Ben (beach/jetty) for the whole forecast. The first few days are a write-off, honestly. We got a run of poor surf from the 5th to the 6th with cross-shore winds, lumpy chop, and swell that's just not cooperating. It’s a real “stay on the couch” kind of start.
From the 7th of September, things get interesting, but not for the faint of heart. A big swell rolls in, hittin' 15 ft on Monday morning with a groundswell period of 9 seconds from the SSE. The energy is massive (4103). The afternoon cleans up with a solid 15 ft S swell and a better 11-second period, and the wind goes offshore. But here's the kicker – the forecast says it's predicted to be too big for this break. The combined energy hits 5391. That's a pulsing, powerful ocean. For a beach/jetty, this is a beast for experts only, and even then, it's a serious call. Tuesday the 8th keeps the size up around 10 ft (SSE, 10 sec, 1861 energy) but with cross-shore wind. It's still well over 8 ft, so it's expert territory, though the wind is light.
The week of the 8th onwards brings a slow fade-out. The 10th of September Thursday afternoon is the best of a pretty average bunch. We get a clean 5 ft S swell with a 9-second period and offshore winds from the NNW. The wave energy is moderate (543) and the conditions are clean. It's not a standout, but it's the closest we get to a decent paddle for a couple of days.
Then we hit a long, flat gap. From the 11th of September right through to the 20th, the swell drops off a cliff. You're lookin' at small, weak waves under 3 ft, mixed with periods of glassy conditions but no real power. The 13th of September Sunday afternoon has a glassy 6 ft E swell, but the period is only 8 seconds, so it's a bit weak and crumbly. The energy is moderate (704). It's a session for the longboard, not a performance board.
The real standout? I'd have to point to the 10th of September Thursday afternoon. It’s the only time in the whole run where you get a clean, offshore window with a surfable size. It's a 5 ft South swell, offshore from the NNW, and the conditions are clean. That's your window. For the rest, it's a waiting game. The forecast suggests this area tends to have these blank runs, so don't be too surprised.
This is Rusty, signing off.
Short Range ForecastHeavy rain (total 312mm), heaviest during Sun night. Warm (max 26°C on Sun night, min 21°C on Fri night). Mainly near gales. | Days 5-7 Weather SummaryHeavy rain (total 61mm), heaviest during Mon night. Warm (max 28°C on Wed morning, min 20°C on Thu afternoon). Winds increasing (calm on Mon night, fresh winds from the SW by Wed afternoon). | ||||||||||||||||||
Saturday 5 | Sunday 6 | Monday 7 | Tuesday 8 | Wednesday 9 | Thursday 10 | ||||||||||||||
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) | SSW 9 | E 6 | E 7 | E 6 | ENE 7 | E 7 | E 8 | SSE 9 | S 11 | S 11 | SSE 10 | SSE 10 | S 10 | S 9 | S 9 | S 9 | S 9 | S 9 | S 8 |
Wave Graph | |||||||||||||||||||
65 | 202 | 202 | 165 | 395 | 569 | 1300 | 3131 | 4922 | 3078 | 1654 | 1452 | 938 | 637 | 753 | 612 | 392 | 313 | 235 | |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross | cross | cross | cross | cross | cross-on | cross-off | off | glassy | cross | cross-off | cross | cross | cross | cross-off | cross-off | off | off |
High Tide | 8:08PM1.35m | 3:59PM1.32m | 10:09PM1.26m | 3:49PM1.38m | 1:09AM1.28m | 4:00PM1.44m | 2:25AM1.38m | 4:17PM1.48m | 3:18AM1.48m | 4:35PM1.51m | |||||||||
Low Tide | 4:21AM0.52m | 6:15AM0.51m | 8:43PM1.26m | 7:44AM0.44m | 8:59PM1.14m | 8:40AM0.37m | 9:23PM1.01m | 9:23AM0.31m | 9:48PM0.87m | 9:59AM0.30m | 10:15PM0.72m | ||||||||
— | 5:13 | — | — | 5:13 | — | — | 5:15 | — | — | 5:16 | — | — | 5:16 | — | — | 5:16 | — | — | |
6:02 | — | 6:01 | — | — | 6:00 | — | — | 5:59 | — | — | 5:57 | — | — | 5:55 | — | — | 5:54 | — | |
mm | 34 | 12 | — | — | 4 | 10 | 136 | 62 | 54 | 18 | 9 | 10 | 5 | 4 | 5 | 7 | 3 | — | — |
Temp °C | 23 | 22 | 22 | 22 | 23 | 23 | 26 | 24 | 23 | 25 | 24 | 23 | 25 | 28 | 28 | 27 | 23 | 21 | 19 |
Feels °C | 25 | 22 | 21 | 21 | 21 | 22 | 23 | 22 | 26 | 29 | 27 | 25 | 28 | 29 | 29 | 28 | 25 | 22 | 20 |
Swell 1 Height (m) Direction Period (s) | SSW 9 | SSW 10 | SSW 10 | SW 10 | SW 9 | SSE 8 | S 12 | E 9 | E 9 | S 11 | SSE 10 | SSE 10 | S 10 | S 9 | S 9 | S 9 | S 9 | S 9 | ENE 7 |
65 | 83 | 61 | 32 | 21 | 20 | 322 | 972 | 469 | 3078 | 1654 | 1452 | 938 | 637 | 753 | 612 | 392 | 313 | 181 | |
Swell 2 Height (m) Direction Period (s) | E 9 | SE 8 | ENE 13 | ENE 12 | SSE 8 | SW 9 | SW 10 | — | — | E 9 | E 9 | E 19 | E 9 | E 9 | ENE 9 | ENE 9 | E 15 | E 15 | S 8 |
41 | 11 | 17 | 14 | 7 | 3 | 4 | — | — | 318 | 202 | 7 | 81 | 63 | 47 | 16 | 68 | 67 | 235 | |
Swell 3 Height (m) Direction Period (s) | SE 6 | ENE 13 | SSE 8 | SSE 8 | ESE 12 | E 15 | — | — | — | — | E 16 | E 19 | E 18 | NE 5 | E 16 | E 16 | SE 11 | SE 11 | E 14 |
20 | 17 | 7 | 7 | 14 | 4 | — | — | — | — | 5 | 7 | 25 | 9 | 46 | 44 | 29 | 18 | 102 | |
Wind waves Height (m) Direction Period (s) | ENE 4 | E 6 | E 7 | E 6 | ENE 7 | E 7 | E 8 | SSE 9 | S 11 | — | — | ENE 9 | NE 5 | NE 10 | NE 4 | NE 3 | ENE 6 | ENE 6 | — |
10 | 202 | 202 | 165 | 395 | 569 | 1300 | 3131 | 4922 | — | — | 222 | 20 | 98 | 14 | 4 | 150 | 145 | — | |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 29 | 29 | 29 | 530 | 530 | 595 | 552 | 81 | 18 | 29 | 29 | 20 | 6 | 38 | 62 | 35 | 2 | 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.










