
Surf Forecasts:
Big Ben surf forecast from 5 Sep 2026:
- Best quality surf: Monday 7 Sep, 6PM (local time) - 13ft (4.0m), 10s period, S swell with cross-shore winds.
- Most powerful swell: Monday 7 Sep, 3PM (local time) - 13ft (4.0m), 10s period, S swell with 3,155 kJ wave energy.
- Next surfable swell (1★+): Monday 7 Sep, 6PM (local time) - 13ft (4.0m), 10s period with S 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 Monday (Sep 07) at 6PM. The primary swell is predicted to be 4.0m and 10s period with a secondary swell of 1.3m and 8s. 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 4.0m 10s and forecast to arrive on Monday (Sep 07) 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 1.0m 5s period and expected on Saturday (Sep 12) at 12AM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 6PM (Mon 7th Sep) | 13ft (4.0m) 10s |
| Best Surf | 6PM (Mon 7th Sep) | 13ft (4.0m) 10s |
| Most Powerful | 3PM (Mon 7th Sep) | 13ft (4.0m) 10s |
Table - best surf conditions forecast for Big Ben over the next 16 days.
The Lowdown
Alright, this is Rusty, and I’m looking at the next 16 days for our stretch of coast. The only spot in the mix is Big Ben, and honestly, it’s a bit of a mixed bag. We’ve got some serious swell coming through, but the wind is going to be our biggest enemy for most of the run. The water is sitting at a warm 83°, which is a touch warmer than normal for this time of year.
The first real sniff of anything worthwhile doesn’t show up until Tuesday, September 8th. We’ve got a solid 8ft swell rolling in from the SSE, with a period of 10 seconds, giving us a lot of energy in the water (1430). But the wind is a moderate cross-shore from the SW, so it’s going to be a bit lumpy. The score is a low one, but it’s the first time the conditions are even considered “marginal” instead of just plain poor. The size is pushing it for beginners, but for the experienced crew, there might be a few to be had if you can handle the chop.
The standout, and I mean the only real standout, is Wednesday, September 9th. The swell jumps up to 10ft from the south, with a period of 9 seconds, and the energy is pumping (1390 in the morning, 1493 in the afternoon). The wind is a fresh cross-shore, which is still not perfect, but the forecast says the wind and tide are favorable. The catch is that the swell is predicted to be too big for this break. At 10ft, this is purely for experts. The combined energy is strong, but the conditions are going to be rough and lumpy. It’s the best on offer, but it’s a big, raw, expert-only beast.
After that, it’s a long dry spell. From Thursday, September 10th, all the way through to Friday, September 18th, we’re looking at a frustrating run. The swell drops back down to 3ft to 5ft, and the wind is all over the place – cross, cross-on, and cross-off. There are a few mornings with clean conditions (like the 11th and 12th), but the swell is tiny, with periods over 13 seconds, and the energy is low (under 400). It’s clean, but it’s barely a ripple. The 14th and 15th offer some marginal 5ft to 4ft swell with clean-ish conditions, but the energy is still weak.
The final mention is on Friday, September 18th. The morning has a clean 4ft swell from the east, with a period of 8 seconds and a gentle cross-off wind. The energy is low (228), but the forecast says “expect good surf conditions.” It’s the only other time the forecast is positive, but it’s a long way out and the swell is small.
So, to sum it up: if you’re an expert, mark Wednesday, September 9th in your calendar. It’s going to be big, heavy, and messy, but it’s the only real pulse of energy we’ve got. For everyone else, it’s a lot of waiting. The forecast can change, but right now, it’s a tough stretch.
Rusty.
Short Range ForecastHeavy rain (total 246mm), heaviest during Sun night. Warm (max 27°C on Mon morning, min 22°C on Sat morning). Winds increasing (light winds from the ENE on Sat afternoon, strong winds from the S by Mon morning). | Days 4-6 Weather SummaryHeavy rain (total 45mm), heaviest during Tue night. Warm (max 28°C on Wed morning, min 17°C on Thu night). Winds increasing (calm on Tue afternoon, fresh winds from the SW by Wed morning). | ||||||||||||||||||||
Saturday 5 | Sunday 6 | Monday 7 | Tuesday 8 | Wednesday 9 | Thursday 10 | Friday 11 | |||||||||||||||
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) | E 6 | SSW 10 | E 6 | ENE 6 | ENE 7 | SE 8 | S 9 | S 10 | S 10 | SSE 10 | SSE 10 | S 9 | S 9 | S 9 | S 9 | NE 7 | ENE 8 | ENE 8 | ENE 7 | E 14 | E 14 |
Wave Graph | |||||||||||||||||||||
108 | 71 | 108 | 272 | 645 | 1286 | 2093 | 3155 | 1569 | 1322 | 1153 | 942 | 1308 | 1422 | 656 | 362 | 319 | 378 | 162 | 140 | 232 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross-on | cross | cross | cross | on | cross-on | cross-on | cross | cross | cross | cross | cross | cross | cross | cross | cross-off | cross | cross-off | cross-off | cross-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 | 4:02AM1.57m | 4:53PM1.53m | |||||||||
Low Tide | 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 | 10:31AM0.32m | 10:42PM0.59m | |||||||||
5:13 | — | — | 5:13 | — | — | 5:15 | — | — | 5:16 | — | — | 5:16 | — | — | 5:16 | — | — | 5:18 | — | — | |
— | 6:01 | — | — | 6:00 | — | — | 5:59 | — | — | 5:57 | — | — | 5:55 | — | — | 5:54 | — | — | 5:52 | — | |
mm | 12 | — | — | 3 | 20 | 151 | 31 | 6 | 23 | 2 | 3 | 9 | 4 | 5 | 7 | 5 | 5 | 5 | — | 1 | — |
Temp °C | 22 | 23 | 22 | 23 | 22 | 26 | 27 | 27 | 27 | 25 | 26 | 27 | 28 | 28 | 23 | 21 | 21 | 21 | 17 | 17 | 19 |
Feels °C | 23 | 23 | 21 | 21 | 20 | 26 | 26 | 27 | 29 | 27 | 30 | 28 | 28 | 29 | 25 | 19 | 18 | 18 | 15 | 15 | 19 |
Swell 1 Height (m) Direction Period (s) | SSW 10 | SSW 10 | SW 9 | SSE 8 | SSE 8 | NE 9 | E 8 | E 8 | S 10 | SSE 10 | SSE 10 | E 9 | E 9 | E 8 | S 9 | S 9 | S 9 | S 8 | E 14 | ENE 6 | ENE 5 |
83 | 61 | 31 | 13 | 21 | 50 | 415 | 235 | 1569 | 1322 | 940 | 41 | 24 | 23 | 656 | 304 | 148 | 65 | 144 | 80 | 42 | |
Swell 2 Height (m) Direction Period (s) | E 9 | E 9 | E 9 | SW 9 | SW 9 | NNE 12 | ESE 11 | — | E 9 | E 9 | E 9 | SSW 13 | E 17 | E 16 | E 16 | E 15 | E 15 | E 14 | S 8 | E 14 | E 14 |
26 | 25 | 23 | 13 | 3 | 15 | 12 | — | 181 | 103 | 79 | 35 | 52 | 46 | 44 | 68 | 67 | 100 | 45 | 140 | 232 | |
Swell 3 Height (m) Direction Period (s) | SE 9 | SE 9 | SSW 8 | SSW 9 | E 15 | — | — | — | — | E 16 | E 19 | E 18 | SE 12 | NE 8 | ESE 11 | ESE 11 | SE 11 | SE 9 | SE 10 | S 8 | S 8 |
12 | 12 | 11 | 8 | 4 | — | — | — | — | 5 | 7 | 25 | 6 | 2 | 12 | 11 | 18 | 3 | 15 | 29 | 29 | |
Wind waves Height (m) Direction Period (s) | E 6 | E 6 | E 6 | ENE 6 | ENE 7 | SE 8 | S 9 | S 10 | — | — | S 9 | S 9 | S 9 | S 9 | NE 6 | NE 7 | ENE 8 | ENE 8 | ENE 7 | — | NNE 5 |
108 | 71 | 108 | 272 | 645 | 1286 | 2093 | 3155 | — | — | 1153 | 942 | 1308 | 1422 | 244 | 362 | 319 | 378 | 162 | — | 46 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 29 | 22 | 530 | 595 | 595 | 48 | 38 | 70 | 60 | 35 | 29 | 29 | 70 | 63 | 29 | 595 | 90 | 229 | 184 | 177 | 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.










