Surf Forecasts:
Big Beach surf forecast from 13 Aug 2026:
- Best quality surf: Wednesday 12 Aug, 11PM (local time) - 3.5ft (1.1m), 16s period, S swell with offshore winds.
- Most powerful swell: Thursday 13 Aug, 2AM (local time) - 4.5ft (1.3m), 16s period, S swell with 879 kJ wave energy.
- Next surfable swell (1★+): Wednesday 12 Aug, 11PM (local time) - 3.5ft (1.1m), 16s period with S 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 Wednesday (Aug 12) at 11PM. The primary swell is predicted to be 1.1m and 16s period with a secondary swell of 0.8m and 13s. The wind is predicted to be offshore as the swell arrives.
The most powerful waves expected at Big Beach in the next 16 days are 1.3m 16s and forecast to arrive on Thursday (Aug 13) 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 3.5m 9s period and expected on Saturday (Aug 15) at 11AM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 11PM (Wed 12th Aug) | 3.5ft (1.1m) 16s |
| Best Surf | 11PM (Wed 12th Aug) | 3.5ft (1.1m) 16s |
| Most Powerful | 2AM (Thu 13th Aug) | 4.5ft (1.3m) 16s |
Table - best surf conditions forecast for Big Beach over the next 16 days.
The Lowdown
Alright, folks, Rusty back at it.
We got a slow start here. Nothing worthwhile until Thursday the 13th. Wednesday the 12th is a total dud with a 3ft S swell, a stiff 25 km/h cross-off wind and combined swell energy of 852. It’s clean but that’s it. Skip it.
Thursday the 13th is the first real green light. Big Beach (United States) shows 4ft of clean S swell on Thursday morning, a solid 16-second period, and offshore wind from the ENE at 15 km/h. Combined energy sits at 719 – a nice moderate push. The afternoon holds a similar 4ft S swell with offshore wind at 20 km/h. This is your window. Crowds are possible sometimes here, but with that quality, you take it.
Friday the 14th stays rideable but fades. Morning has 3ft S swell, still 16 seconds, cross-off wind, energy down to 445. Afternoon is similar at 3ft but with a nicer offshore NE wind at 15 km/h and 452 energy. Clean, just not as punchy.
Saturday the 15th is a hard pass. Only 3ft S swell with a nasty 35 km/h offshore wind that makes it messy. Keep the board dry.
Sunday the 16th brings a bigger, uglier swell. Morning has 7ft of S swell but a short 10-second period and combined energy of 1119 – that’s strong. Wind is cross-off at 25 km/h, risk of storms. This is expert only; too big for beginners and that period is junk. Afternoon settles to 5ft S, an even worse 8-second period, 524 energy, cleaner wind but still rough.
From Monday the 17th through Wednesday the 19th, it’s tiny stuff – 2ft to 3ft, energy dropping from 300 to just 69 by Wednesday morning. Long period (12-14 seconds) keeps it clean but small and weak. Just get wet, don’t expect fireworks.
Thursday the 20th sees a shift. Swell comes from the SSW at 2ft but with an 18-second period – a real long-period groundswell. Energy 232. Light cross-off east wind at 10 km/h. Friday 21st continues similar, 2ft SSW, 16 seconds, 251 energy, light morning wind. It’s clean but tiny, and that long period is better suited to a reef or point than a beach break like Big Beach.
The absolute standout of the entire 16 days is Monday the 25th of August. Tuesday morning sees a clean 3ft SSW swell, 14-second period, combined energy of 707, and light cross-off east wind at 10 km/h. That’s prime. The afternoon pushes energy to 724 but a risk of thunder. The morning is the session to circle on your calendar.
The final few days, the 26th and 27th, show 3ft to 3ft SSW and S swells with periods into the 13 to 18-second range and combined energy in the 470-530 zone. Light cross-off winds keep it clean and reliable, but nothing tops that Monday the 25th.
Water temp is 80°F with just a 0.7°F anomaly – normal for the season, nothing wild.
Rusty out.
Short Range ForecastMostly dry. Warm (max 29°C on Thu afternoon, min 25°C on Wed night). Winds increasing (light winds from the NNE on Thu morning, fresh winds from the ENE by Sat afternoon). | Days 5-7 Weather SummaryModerate rain (total 12mm), heaviest on Sun afternoon. Warm (max 28°C on Sun morning, min 25°C on Mon night). Winds decreasing (fresh winds from the ENE on Sat night, light winds from the E by Tue morning). | ||||||||||||||||||
Thursday 13 | Friday 14 | Saturday 15 | Sunday 16 | Monday 17 | Tuesday 18 | ||||||||||||||
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) | S 16 | S 16 | S 15 | S 15 | S 14 | S 14 | S 14 | S 13 | S 13 | S 14 | S 16 | S 13 | S 15 | S 14 | S 14 | S 13 | S 13 | S 13 | S 13 |
Wave Graph  | |||||||||||||||||||
 kJ | 879 | 597 | 653 | 636 | 423 | 411 | 293 | 284 | 225 | 195 | 615 | 168 | 347 | 264 | 257 | 170 | 162 | 119 | 117 |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | off | off | off | off | off | off | off | off | cross-off | off | cross-off | cross-off | cross-off | cross-off | cross-off | off | cross-off | cross-off | off |
High Tide | 3:49AM0.38m | 4:46PM0.63m | 4:34AM0.41m | 5:11PM0.59m | 5:20AM0.42m | 5:33PM0.53m | 6:07AM0.42m | 5:49PM0.48m | 7:00AM0.41m | 5:58PM0.42m | 8:09AM0.40m | 5:51PM0.38m | |||||||
Low Tide | 10:35PM0.10m | 9:40AM-0.03m | 11:00PM0.09m | 10:19AM0.01m | 11:25PM0.07m | 10:57AM0.06m | 11:49PM0.06m | 11:35AM0.12m | 00:14AM0.06m | 12:13PM0.17m | 00:39AM0.06m | 1:00PM0.23m | 1:08AM0.06m | ||||||
 |  | | | | |  | |  | | |  |  |  | | | | | | |
 | — | 6:03 | — | — | 6:03 | — | — | 6:03 | — | — | 6:05 | — | — | 6:05 | — | — | 6:05 | — | — |
 | 6:57 | — | 6:55 | — | — | 6:55 | — | — | 6:54 | — | — | 6:53 | — | — | 6:52 | — | — | 6:52 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | 3 | 5 | 3 | 1 | — | — | — | — |
Temp °C | 26 | 28 | 29 | 26 | 28 | 28 | 27 | 28 | 28 | 27 | 28 | 28 | 27 | 27 | 27 | 26 | 27 | 27 | 26 |
Feels °C | 26 | 28 | 29 | 26 | 28 | 28 | 28 | 27 | 26 | 24 | 27 | 29 | 27 | 29 | 28 | 27 | 28 | 27 | 27 |
Swell 1 Height (m) Direction Period (s) | S 16 | S 16 | S 15 | S 15 | S 14 | S 14 | S 14 | S 13 | S 13 | S 14 | S 16 | S 13 | S 15 | S 14 | S 14 | S 13 | S 13 | S 13 | E 8 |
| kJ | 879 | 597 | 653 | 636 | 423 | 411 | 293 | 284 | 225 | 195 | 615 | 168 | 347 | 264 | 257 | 170 | 162 | 119 | 63 |
Swell 2 Height (m) Direction Period (s) | W 12 | SSW 12 | W 12 | W 12 | W 12 | W 12 | W 11 | W 11 | W 11 | S 18 | W 12 | S 16 | S 7 | SSW 7 | W 11 | W 11 | E 8 | SW 18 | S 13 |
| kJ | 25 | 111 | 11 | 11 | 10 | 11 | 10 | 9 | 10 | 99 | 26 | 127 | 23 | 18 | 10 | 10 | 45 | 79 | 117 |
Swell 3 Height (m) Direction Period (s) | — | W 12 | SW 19 | SW 18 | SW 18 | SSW 17 | SSW 17 | SW 17 | SSW 16 | W 13 | SW 19 | S 8 | W 11 | SW 18 | SSW 19 | SSW 19 | SW 17 | W 13 | SW 18 |
| kJ | — | 11 | 14 | 13 | 13 | 30 | 30 | 11 | 25 | 30 | 15 | 28 | 23 | 50 | 37 | 37 | 74 | 14 | 79 |
Wind waves Height (m) Direction Period (s) | E 6 | E 8 | E 6 | E 6 | E 6 | E 6 | E 11 | E 9 | E 9 | E 8 | E 8 | E 7 | E 6 | E 5 | E 6 | E 5 | E 4 | E 8 | E 4 |
| kJ | 117 | 187 | 346 | 273 | 302 | 449 | 1606 | 2247 | 1929 | 1335 | 1075 | 510 | 211 | 104 | 100 | 83 | 18 | 104 | 17 |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 0 | 0 | 0 | 4 | 0 | 4 | 11 | 11 | 11 | 11 | 11 | 11 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
Best forecast wave conditions in Maui | |||||||||||||||||||
Best forecast wave conditions in United States | |||||||||||||||||||
Header Global | |||||||||||||||||||
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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.
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