Surf Forecasts:
Big Ben surf forecast from 28 Aug 2026:
- Best quality surf: Friday 4 Sep, 6AM (local time) - 7ft (2.1m), 7s period, S swell with glassy winds.
- Most powerful swell: Friday 4 Sep, 3PM (local time) - 7.5ft (2.3m), 7s period, SSW swell with 471 kJ wave energy.
- Next surfable swell (1★+): Saturday 29 Aug, 3PM (local time) - 2ft (0.6m), 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 Saturday (Aug 29) at 3PM. The primary swell is predicted to be 0.6m and 11s period with a secondary swell of 0.8m and 5s. 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 2.3m 7s and forecast to arrive on Friday (Sep 04) at 3PM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.9m 6s period and expected on Saturday (Aug 29) at 3PM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 3PM (Sat 29th Aug) | 2ft (0.6m) 11s |
| Best Surf | 6AM (Fri 4th Sep) | 7ft (2.1m) 7s |
| Most Powerful | 3PM (Fri 4th Sep) | 7.5ft (2.3m) 7s |
Table - best surf conditions forecast for Big Ben over the next 16 days.
The Lowdown
Alright folks, Rusty here with a look at what’s cooking at Big Ben over the next couple of weeks. The water’s running at a touch warmer than normal for late August – about 82°F, which is 2°F above the seasonal average, so the water feels lovely.
Now, to be straight with you, we’ve got a pretty quiet start. The first few days are for the diehards only. Saturday the 29th and Sunday the 30th are bringing tiny 2ft to 2ft easterly swells with really weak energy (174 down to 103). There's a brief moment of glass on Saturday afternoon, but the waves are just too ordinary to get excited about. That flat spell runs through Monday the 31st too.
Things finally perk up on Tuesday morning, September 1st. We get a clean 3ft ESE swell with a decent 12-second period. The wind is light and cross-offshore, so the conditions will be tidy. The combined energy jumps to a modest 272, so it’s small but surfable for a beginner-friendly beach/jetty spot. That’s our first real glimmer of hope – go easy on yourself and have a fun paddle.
There’s another clean morning on Wednesday the 2nd with glassy conditions and a 3ft easterly swell, still manageable energy at 239. It’s nice, but still not a standout.
The real action, the stuff that gets the heart pumping, kicks off on Friday afternoon, September 4th. We’ve got a 8ft SSW swell rolling in, with only a 7-second period – so it’s a bit short and choppy, but the wind is light and cross-offshore, keeping the surface clean. The combined energy is a beefy 559, making this the best wave size and quality up to that point. This one’s borderline for beginners at over 5ft, so it's for the hungry intermediates and crew looking for a punchy wave.
Saturday the 5th and Sunday the 6th stay solid, but the wind gets a bit too strong on Saturday morning (19 mph cross-off) and the swell bounces around 6ft to 8ft with NE to ENE direction. The energy is huge – 1155 to 1260 – but the conditions are mixed with that cross-onshore on Sunday afternoon. It’s a bit of a dice roll.
The true standout is Monday, September 7th. The early morning session looks absolutely stunning. The swell is a solid 8ft from the east with a 10-second period, but it’s glassy – dead calm wind – and the combined energy is a massive 2022. This is the best on offer for experienced surfers. The wave will have real power, but that size (over 8ft) means it's expert territory only. If you’re a competent surfer, this is the call of the whole outlook. Tides and wind should align for a magic hour.
Things get nuts and then shut down after that. From Tuesday the 8th right through the following Sunday, the swell just explodes. We’re talking 10ft to 15ft southerly swell with insane energy readings up to 6689. But the nudge from the guidance is clear: it's too big for this beach/jetty break. The wind is often cross or lumpy, so it looks more interesting for kite surfing than paddle surfing. Steer clear unless you’re on a gun and know the place like the back of your hand.
By the 10th it eases, dropping back to 5ft to 5ft, but the wind stays messy and cross-shore through to the 12th. Then on Sunday, September 13th, another enormous pulse (13ft to 15ft SSE) hits, but it's the same story – way too big for a fun session here.
So, to sum it up: the early week is small but clean for beginners, Friday the 4th offers a punchy step up, and Monday morning September 7th is your absolute best bet for a proper, clean, glassy, powerful session. After that, check the kite gear or stay home.
Rusty.
Short Range ForecastLight rain (total 8mm), mostly falling on Sat morning. Warm (max 28°C on Mon morning, min 21°C on Sat night). Wind will be generally light. | Days 4-6 Weather SummaryLight rain (total 4mm), mostly falling on Thu night. Warm (max 29°C on Wed morning, min 25°C on Tue night). Wind will be generally light. | ||||||||||||||||||||
Saturday 29 | Sunday 30 | Monday 31 | Tuesday 1 | Wednesday 2 | Thursday 3 | Friday 4 | |||||||||||||||
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 12 | E 11 | ENE 6 | E 11 | E 12 | E 11 | E 11 | ESE 14 | ESE 12 | ESE 12 | E 11 | E 11 | E 10 | SE 7 | E 10 | E 12 | SSE 7 | SSE 7 | S 7 | SSW 7 | SSW 10 |
Wave Graph | |||||||||||||||||||||
98 | 91 | 68 | 66 | 67 | 61 | 59 | 105 | 208 | 228 | 240 | 184 | 127 | 163 | 92 | 229 | 170 | 303 | 376 | 471 | 339 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | glassy | cross-off | cross-off | cross | cross-off | cross-off | glassy | cross-off | cross-off | on | glassy | glassy | cross-on | cross | cross | cross-on | cross | cross | cross-off | cross-off |
High Tide | 5:47PM1.54m | 5:42AM1.60m | 6:06PM1.55m | 6:21AM1.55m | 6:26PM1.55m | 7:02AM1.47m | 6:45PM1.54m | 7:47AM1.35m | 7:06PM1.51m | 8:45AM1.23m | 7:27PM1.48m | 10:29AM1.12m | 7:48PM1.43m | ||||||||
Low Tide | 11:29AM0.31m | 11:40PM0.54m | 11:57AM0.41m | 00:11AM0.46m | 12:23PM0.54m | 00:45AM0.42m | 12:48PM0.68m | 1:22AM0.41m | 1:09PM0.82m | 2:05AM0.43m | 1:26PM0.96m | 3:00AM0.47m | 1:21PM1.08m | ||||||||
5:09 | — | — | 5:09 | — | — | 5:09 | — | — | 5:11 | — | — | 5:11 | — | — | 5:11 | — | — | 5:13 | — | — | |
— | 6:10 | — | — | 6:09 | — | — | 6:08 | — | — | 6:07 | — | — | 6:06 | — | — | 6:04 | — | — | 6:02 | — | |
mm | 3 | 2 | — | — | 1 | — | 1 | 1 | — | — | — | — | — | — | — | 1 | — | 3 | 2 | 4 | 32 |
Temp °C | 26 | 25 | 22 | 26 | 26 | 24 | 28 | 28 | 25 | 28 | 27 | 26 | 29 | 29 | 26 | 29 | 29 | 27 | 26 | 25 | 24 |
Feels °C | 30 | 29 | 23 | 29 | 30 | 27 | 33 | 33 | 29 | 32 | 31 | 32 | 33 | 32 | 30 | 30 | 30 | 30 | 30 | 30 | 27 |
Swell 1 Height (m) Direction Period (s) | E 12 | E 5 | E 11 | ENE 6 | E 6 | E 5 | E 11 | ESE 14 | ESE 12 | ESE 12 | E 11 | E 11 | ESE 7 | ESE 7 | ESE 7 | E 12 | E 11 | E 11 | SW 11 | E 10 | SSW 10 |
98 | 31 | 63 | 42 | 30 | 19 | 59 | 105 | 208 | 228 | 240 | 184 | 84 | 117 | 68 | 229 | 149 | 110 | 150 | 69 | 339 | |
Swell 2 Height (m) Direction Period (s) | SW 6 | E 11 | SW 6 | E 11 | E 12 | E 11 | E 5 | E 11 | E 6 | E 6 | E 6 | E 6 | E 10 | E 10 | E 10 | SSW 10 | SSW 12 | SW 11 | E 10 | E 14 | SE 7 |
16 | 91 | 14 | 66 | 67 | 61 | 13 | 57 | 25 | 15 | 21 | 25 | 127 | 98 | 92 | 75 | 98 | 123 | 71 | 16 | 60 | |
Swell 3 Height (m) Direction Period (s) | SSE 11 | SW 6 | SE 10 | SE 10 | SE 10 | SE 10 | SE 9 | ENE 6 | E 11 | SSW 9 | SSW 10 | SSW 9 | SSW 8 | SSW 10 | SSW 10 | SW 13 | SSW 9 | S 13 | ENE 14 | S 12 | E 10 |
47 | 19 | 27 | 26 | 27 | 26 | 31 | 16 | 61 | 29 | 37 | 31 | 28 | 54 | 54 | 43 | 48 | 4 | 20 | 3 | 46 | |
Wind waves Height (m) Direction Period (s) | ENE 4 | SW 6 | ENE 6 | — | — | — | — | WSW 5 | — | — | — | — | — | SE 7 | SSE 6 | SE 7 | SSE 7 | SSE 7 | S 7 | SSW 7 | NE 8 |
13 | 60 | 68 | — | — | — | — | 2 | — | — | — | — | — | 163 | 68 | 127 | 170 | 303 | 376 | 471 | 214 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 24 | 0 | 22 | 0 | 22 | 0 | 0 | 0 | 0 | 0 | 38 | 0 | 0 | 30 | 30 | 70 | 30 | 35 | 6 | 0 | 183 |
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.











