
Surf Forecasts:
Big Beach surf forecast from 15 Sep 2026:
- Best quality surf: Tuesday 15 Sep, 11AM (local time) - 2.5ft (0.7m), 20s period, SW swell with cross-offshore winds.
- Most powerful swell: Friday 18 Sep, 2AM (local time) - 3ft (0.9m), 18s period, SSW swell with 541 kJ wave energy.
- Next surfable swell (1★+): Tuesday 15 Sep, 11AM (local time) - 2.5ft (0.7m), 20s period with SW swell.
Best Forecast Surf Conditions for Big Beach this week:
The surf forecast for Big Beach over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Tuesday (Sep 15) at 11AM. The primary swell is predicted to be 0.7m and 20s period. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at Big Beach in the next 16 days are 0.9m 18s and forecast to arrive on Friday (Sep 18) at 2AM. Winds are predicted to be offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 2.5m 9s period and expected on Monday (Sep 21) at 8PM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 11AM (Tue 15th Sep) | 2.5ft (0.7m) 20s |
| Best Surf | 11AM (Tue 15th Sep) | 2.5ft (0.7m) 20s |
| Most Powerful | 2AM (Fri 18th Sep) | 3ft (0.9m) 18s |
Table - best surf conditions forecast for Big Beach over the next 16 days.
The Lowdown
Alright, Rusty here, let’s talk about what we’ve got coming up at Big Beach. It’s a bit of a mixed bag, but there are a few windows that’ll be worth paddling out for.
We’re kicking off the period with some solid, clean conditions. On Tuesday the 15th, we’ve got a long-period groundswell from the SW at 2 ft, with a period of 20 seconds. That’s a real deep ocean pulse, bringing in a moderate wave energy (434). The morning has a light cross-off breeze, keeping the surface clean, and the water’s sitting at 81°, which is about average for this time of year. A smallish swell with that kind of period means the sets will be well-spaced and have some push, but it’s not too big for anyone.
That pattern carries into Wednesday the 16th. The swell ticks up to 3 ft in the morning and 3 ft in the afternoon, still from the SSW/SW with a very long period of 18 seconds. The wind goes offshore from the NE, and it goes glassy in the morning before a moderate offshore breeze in the afternoon. This is clean, lined-up, and grunty for its size. The combined energy is moderate (434-486). This is probably your best chance for a proper session—a true standout.
Thursday the 17th still offers clean surf in the morning with a 3 ft SW swell and a 16-second period, though the energy is climbing (446). The afternoon gets dicey with a risk of thunderstorms and a building onshore breeze, so don't sleep on the early.
From Friday the 18th onward, things get a bit messy. The swell drops slightly but the wind picks up, especially on Friday afternoon when a fresh ESE breeze at 19 mph kicks up the chop. The combined energy is strong (606) but the quality isn’t there for a paddle board—might be more interesting for kite foilers. Saturday and Sunday (19th-20th) keep the swell around 2-3 ft, but the cross-off winds get a bit stronger and the period drops to 15 seconds, making it less appealing.
We hit a quiet patch from Monday the 22nd through to Thursday the 24th. Swell sizes drop to 2-2 ft, periods shorten, and winds go cross-on or onshore. The energy numbers fall (as low as 182), and the wave comments are blunt: poor conditions or marginal. Not worth the drive.
There’s a bit of life again late in the run. On Saturday the 26th, the swell bumps up to 2 ft from the SW with a 15-second period, and the wind goes glassy offshore in the afternoon. That’s a late-afternoon window that could be fun if you’re patient. Then Monday the 28th and Tuesday the 29th shape up nicely: clean, glassy or light offshore winds, with a 2-3 ft SSW swell and moderate energy (374-392). It’s later in the forecast, so less certain, but it’s promising.
Remember, Big Beach is a consistent spot and fairly exposed, so sometimes the crowds show up on those clean days. But the water’s warm and the waves are user-friendly.
All in all, the real standouts are Wednesday the 16th and Monday the 28th into Tuesday the 29th. Get it while it’s clean.
Rusty.
Short Range ForecastLight rain (total 6mm), mostly falling on Thu afternoon. Warm (max 28°C on Tue morning, min 26°C on Tue morning). Wind will be generally light. | Days 4-6 Weather SummaryMostly dry. Warm (max 29°C on Fri afternoon, min 25°C on Sat night). Mainly fresh winds. | ||||||||||||||||||||
Tuesday 15 | Wednesday 16 | Thursday 17 | Friday 18 | Saturday 19 | Sunday 20 | Monday 21 | |||||||||||||||
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) | SW 20 | SW 20 | SW 19 | SSW 18 | SW 18 | SSW 17 | SW 16 | SW 16 | SSW 18 | SSW 16 | SSW 17 | SSW 16 | SSW 15 | SW 16 | SSW 16 | SSW 15 | SSW 15 | SSW 14 | SSW 14 | SSW 13 | SSW 13 |
Wave Graph | |||||||||||||||||||||
392 | 388 | 376 | 399 | 449 | 381 | 371 | 255 | 541 | 412 | 522 | 390 | 174 | 258 | 269 | 304 | 370 | 269 | 247 | 236 | 178 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross-off | off | off | off | cross-off | cross-off | cross-off | off | cross-off | cross-off | off | cross-off | cross-off | off | cross-off | cross-off | off | cross-off | off | off |
High Tide | 4:53PM0.38m | 7:18AM0.45m | 4:37PM0.35m | 8:46AM0.42m | 11:31AM0.42m | 12:44PM0.45m | 1:19PM0.49m | 00:25AM0.24m | 1:45PM0.52m | 1:07AM0.29m | |||||||||||
Low Tide | 12:03PM0.20m | 11:28PM0.03m | 12:57PM0.23m | 11:52PM0.05m | 00:22AM0.08m | 1:27AM0.10m | 4:31AM0.11m | 8:38PM0.15m | 5:56AM0.09m | 8:23PM0.14m | |||||||||||
6:11 | — | — | 6:13 | — | — | 6:13 | — | — | 6:13 | — | — | 6:13 | — | — | 6:13 | — | — | 6:13 | — | — | |
— | 6:28 | — | — | 6:27 | — | — | 6:25 | — | — | 6:24 | — | — | 6:24 | — | — | 6:23 | — | — | 6:22 | — | |
mm | — | — | — | — | — | — | — | 4 | 2 | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 28 | 28 | 27 | 28 | 28 | 27 | 28 | 28 | 27 | 28 | 29 | 27 | 28 | 28 | 26 | 27 | 28 | 26 | 28 | 28 | 27 |
Feels °C | 31 | 31 | 29 | 31 | 29 | 29 | 30 | 30 | 28 | 28 | 28 | 27 | 30 | 28 | 25 | 28 | 28 | 26 | 29 | 29 | 28 |
Swell 1 Height (m) Direction Period (s) | SW 20 | SW 20 | SW 19 | SSW 18 | SW 18 | E 10 | SW 16 | SW 16 | SSW 18 | SSW 16 | SSW 17 | SSW 16 | SSW 15 | SW 16 | SSW 16 | SSW 15 | SSW 15 | SSW 14 | SSW 14 | SSW 13 | SSW 13 |
392 | 388 | 376 | 399 | 449 | 194 | 371 | 255 | 541 | 412 | 522 | 390 | 174 | 258 | 269 | 304 | 370 | 269 | 247 | 236 | 178 | |
Swell 2 Height (m) Direction Period (s) | E 12 | E 11 | E 11 | E 10 | SW 11 | SSW 17 | SSW 20 | SSW 18 | SSW 18 | SW 18 | SSW 16 | SW 16 | SW 16 | S 15 | SW 15 | SW 14 | SW 15 | SW 15 | SW 14 | SW 14 | SW 14 |
45 | 39 | 56 | 72 | 31 | 381 | 38 | 188 | 61 | 80 | 50 | 125 | 129 | 112 | 113 | 53 | 54 | 33 | 51 | 31 | 30 | |
Swell 3 Height (m) Direction Period (s) | SW 13 | SW 12 | SW 12 | SW 12 | WSW 8 | SW 11 | SSW 19 | SW 20 | WSW 8 | W 9 | S 21 | W 9 | SSW 18 | S 18 | SSW 14 | S 8 | W 13 | W 12 | W 12 | W 11 | W 12 |
42 | 39 | 38 | 35 | 6 | 19 | 37 | 60 | 7 | 6 | 34 | 2 | 107 | 99 | 36 | 1 | 3 | 3 | 11 | 2 | 10 | |
Wind waves Height (m) Direction Period (s) | E 4 | E 5 | E 5 | E 5 | E 5 | ENE 5 | ENE 6 | E 9 | E 6 | E 7 | E 8 | E 6 | E 6 | E 8 | E 6 | E 6 | E 6 | E 6 | E 9 | E 7 | E 9 |
16 | 34 | 49 | 36 | 100 | 64 | 209 | 521 | 366 | 453 | 407 | 272 | 312 | 392 | 237 | 245 | 224 | 185 | 435 | 573 | 955 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 0 | 0 | 0 | 0 | 4 | 0 | 0 | 11 | 0 | 0 | 90 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
Best forecast wave conditions in Maui | |||||||||||||||||||||
Best forecast wave conditions in United States | |||||||||||||||||||||
Header Global | |||||||||||||||||||||
- Map Icons:
Break
Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)
Wind Speed (km/h)
Information about the Big Beach Surf forecast
The above surf forecast table for Big Beach provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Big Beach can be found by selecting the local surf guide option on the grey menu. Our Big Beach 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 Beach) 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 Beach 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.
Are you planning a vacation in Maui? If you are looking for accommodation near Big Beach, camping, hotels and condos and appartments in Maui, consider staying in Kihei which is 17 km (11 miles) away. Other places in and around Maui where you can find information about places to rent, and car hire include Wailuku which is 28 km (17 miles) away, Kahului, Lanai - Lanai and Kaunakakai - Molokai.










