
Surf Forecasts:
Big Ben surf forecast from 5 Sep 2026:
- Best quality surf: Sunday 6 Sep, 9PM (local time) - 10ft (3.0m), 8s period, E swell with cross-shore winds.
- Most powerful swell: Monday 7 Sep, 3PM (local time) - 13ft (4.0m), 10s period, S swell with 3,407 kJ wave energy.
- Next surfable swell (1★+): Sunday 6 Sep, 9PM (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 9PM. The primary swell is predicted to be 3.0m and 8s period with a secondary swell of 0.7m and 10s. Another secondary swell of 0.2m and 12s 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 4.0m 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 1.4m 6s period and expected on Thursday (Sep 10) at 3AM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 9PM (Sun 6th Sep) | 10ft (3.0m) 8s |
| Best Surf | 9PM (Sun 6th Sep) | 10ft (3.0m) 8s |
| 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
G’day, Rusty here. Lookin’ at the forecast for Big Ben, and I gotta be straight with ya – it’s a frustrating run. The first few days are a write-off, and the whole 16-day window is a mixed bag of almosts and maybes. There’s no true standout, but a couple of moments might be worth a look if you’re desperate and local.
The water is sitting at about 83°, which is a touch warmer than normal for this time of year – a bit strange, but not unpleasant.
The whole period starts with a thud. Saturday the 5th through Sunday the 7th is a total loss. The swell is all over the place, but the wind is howling onshore or cross-shore, churning it up, and the weather is nasty with rain and storms. The combined swell energy is moderate at 168 but the quality is just poor. It’s a write-off.
Monday the 8th is where it gets interesting, but also tricky. Tuesday morning brings a solid 10 ft south swell with a 10-second period, and the combined energy is a strong 3392. The wind is a moderate cross-shore from the southwest. The word is that the swell might be too big for this break – 10 ft is pushing into expert territory, and Big Ben is a beach/jetty. For a regular surfer, it’s likely a washing machine. Tuesday afternoon calms down a bit to 8 ft, and the wind drops to a light cross-shore, but the energy is still moderate at 1026. The comment says “marginal surf forecast or questionable tide conditions.” It’s the best of a bad bunch, but don’t expect perfection. The swell direction is from the SSE, which is not the optimum SE direction for this spot.
Wednesday the 9th and Thursday the 10th stay messy with onshore wind and poor surf conditions. The energy drops into the moderate 700 range, but the wind is fresh and lumpy. Not worth paddling out.
There’s a little glimmer from Friday the 11th morning through to Saturday the 12th afternoon. The swell drops to 3 ft to 6 ft, and the wind turns cross-offshore from the NNE, giving clean conditions. The period is short on the 11th (7 seconds), but on the 12th, a long-period 14-second groundswell from the east shows up. The combined energy is weak to moderate (358 to 400). This is a tiny, long-period swell – it’ll be nice and clean, but at a beach/jetty, it might break pretty straight. It’s a beginner-friendly size, though. The problem is the marginal comment – it’s still a gamble.
The second week is a bit of a blur. Sunday the 13th to Monday the 14th offers small, clean waves in the 3 ft to 5 ft range, but with easterly wind and moderate energy (406 to 910). Tuesday the 15th morning has a 5 ft east swell with a 13-second period, and combined energy of 1566 – that’s a solid moderate energy. The wind is a gentle cross-offshore, making it clean. It’s the most promising day in the second week. The rest of the week from Wednesday the 16th onward fades out with small, weak swell (2 ft to 4 ft) and poor conditions.
Honestly, if you’re a beginner, Tuesday the 15th morning might be your best shot for some clean, small waves. For the more experienced, Tuesday the 8th morning has the size, but it’s a gamble on whether it’s too big and messy. No real standout here, just a few windows where the stars might align.
Rusty.
Short Range ForecastHeavy rain (total 179mm), heaviest during Sun night. Warm (max 27°C on Mon morning, min 22°C on Sat afternoon). Winds decreasing (strong winds from the SSE on Mon morning, light winds from the SW by Tue morning). | Days 5-7 Weather SummaryHeavy rain (total 49mm), heaviest during Wed morning. Warm (max 27°C on Tue night, min 17°C on Thu night). Winds decreasing (fresh winds from the SSW on Wed morning, calm by Wed night). | |||||||||||||||||||
Sat 5 | Sunday 6 | Monday 7 | Tuesday 8 | Wednesday 9 | Thursday 10 | Friday 11 | ||||||||||||||
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) | SSW 10 | E 5 | E 7 | E 8 | ESE 8 | SSE 8 | S 10 | S 10 | SSE 10 | SSE 10 | SSE 9 | S 8 | S 8 | SSW 9 | S 8 | NE 7 | ENE 7 | ENE 7 | NE 7 | E 14 |
Wave Graph | ||||||||||||||||||||
71 | 82 | 414 | 694 | 1045 | 1817 | 3407 | 2037 | 1827 | 940 | 454 | 596 | 655 | 858 | 411 | 241 | 359 | 235 | 246 | 183 | |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross | cross | cross | cross-on | on | cross-on | cross | cross | cross | cross-on | cross-on | cross | glassy | cross-off | cross | cross-off | cross-off | cross-off | glassy |
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 | — | — | 5:15 | — | — | 5:16 | — | — | 5:16 | — | — | 5:16 | — | — | 5:18 | — | — | |
6:01 | — | — | 6:00 | — | — | 5:59 | — | — | 5:57 | — | — | 5:55 | — | — | 5:54 | — | — | 5:52 | — | |
mm | — | — | 5 | 17 | 98 | 23 | 7 | 23 | 6 | 2 | 7 | 8 | 7 | 11 | 6 | 2 | 6 | — | — | — |
Temp °C | 22 | 23 | 23 | 22 | 25 | 27 | 27 | 27 | 26 | 26 | 27 | 27 | 27 | 26 | 22 | 21 | 19 | 18 | 18 | 21 |
Feels °C | 22 | 21 | 20 | 20 | 25 | 26 | 26 | 28 | 29 | 30 | 30 | 28 | 29 | 29 | 20 | 19 | 16 | 16 | 17 | 24 |
Swell 1 Height (m) Direction Period (s) | SSW 10 | SW 9 | SW 9 | SSE 8 | S 9 | E 8 | E 9 | S 10 | SSE 10 | SSE 10 | SSE 9 | E 9 | E 9 | S 8 | S 8 | S 8 | S 8 | S 8 | ENE 7 | ENE 7 |
61 | 31 | 13 | 21 | 173 | 195 | 286 | 2037 | 1441 | 940 | 454 | 55 | 37 | 265 | 411 | 241 | 109 | 61 | 138 | 62 | |
Swell 2 Height (m) Direction Period (s) | E 9 | E 9 | SSE 8 | SW 9 | NE 11 | NE 8 | — | E 9 | E 9 | E 9 | SSW 10 | E 17 | E 16 | SSW 9 | E 15 | E 15 | E 14 | E 14 | S 8 | E 14 |
25 | 24 | 7 | 3 | 73 | 69 | — | 185 | 119 | 79 | 88 | 52 | 46 | 190 | 68 | 67 | 100 | 144 | 42 | 183 | |
Swell 3 Height (m) Direction Period (s) | SE 8 | SSW 8 | SSW 8 | E 15 | SW 10 | — | — | NE 11 | E 16 | E 19 | E 9 | SE 12 | NE 8 | E 8 | ESE 11 | SE 11 | SE 10 | ESE 10 | E 14 | S 8 |
11 | 11 | 6 | 4 | 4 | — | — | 5 | 5 | 7 | 78 | 6 | 2 | 23 | 12 | 18 | 16 | 10 | 140 | 55 | |
Wind waves Height (m) Direction Period (s) | E 6 | E 5 | E 7 | E 8 | ESE 8 | SSE 8 | S 10 | — | S 10 | — | SSW 9 | S 8 | S 8 | SSW 9 | NE 7 | NE 7 | ENE 7 | ENE 7 | NE 7 | — |
71 | 82 | 414 | 694 | 1045 | 1817 | 3407 | — | 1827 | — | 231 | 596 | 655 | 858 | 215 | 237 | 359 | 235 | 246 | — | |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 29 | 530 | 595 | 595 | 595 | 532 | 616 | 177 | 70 | 35 | 30 | 50 | 35 | 0 | 595 | 229 | 513 | 557 | 6 | 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.










