Surf Forecasts:
Big Beach surf forecast from 19 Aug 2026:
- Best quality surf: Friday 21 Aug, 2AM (local time) - 2.5ft (0.7m), 16s period, SW swell with offshore winds.
- Most powerful swell: Friday 21 Aug, 8AM (local time) - 2.5ft (0.7m), 17s period, SW swell with 298 kJ wave energy.
- Next surfable swell (1★+): Wednesday 19 Aug, 5AM (local time) - 1.5ft (0.5m), 12s 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 19) at 5AM. The primary swell is predicted to be 0.5m and 12s period with a secondary swell of 0.3m and 12s. 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 0.7m 17s and forecast to arrive on Friday (Aug 21) at 8AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 3.0m 7s period and expected on Sunday (Aug 23) at 11PM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 5AM (Wed 19th Aug) | 1.5ft (0.5m) 12s |
| Best Surf | 2AM (Fri 21st Aug) | 2.5ft (0.7m) 16s |
| Most Powerful | 8AM (Fri 21st Aug) | 2.5ft (0.7m) 17s |
Table - best surf conditions forecast for Big Beach over the next 16 days.
The Lowdown
G’day, Rusty here. Look, I’ll level with you—this stretch isn’t exactly firing. The next 16 days are pretty flat and underwhelming, with only one small window that’s worth paddling out for. We’ve got a long gap of weak, marginal surf from now through to late August, so don’t rush.
The standout is Friday morning, 21 August at Big Beach. We’ve got a 2ft SSW swell (period 16s) with a combined swell energy of 291 (moderate). The wind is a light cross-off from the east, keeping it clean. That’s the pick of the month—small but rideable, and the long period means there’s some push behind it. The water temp is about average for this time of year, so nothing weird going on.
Before that, Wednesday the 19th and Thursday the 20th are tiny—1ft to 2ft—with periods over 15s but very low energy (136–228). The morning of the 20th is glassy though, so if you’re desperate, you could get a few knee-high runners. Friday afternoon the 21st gets a bit messy with a risk of thunderstorms, and from Saturday the 22nd through Tuesday the 26th, the wind picks up (25–35 km/h) and the wave quality tanks. The swell barely nudges 2ft, and the energy stays weak (167–468). Not worth a look.
Then we hit Thursday morning, 27 August. Swell bumps to 4ft from the south (period 16s) with a moderate energy of 639. Offshore wind from the NE, clean conditions. That’s the best size in the whole run, but it’s still modest. Friday the 28th and Tuesday the 1st of September also show some promise with 3ft and 2ft swells, clean offshore winds, and moderate energy (321–335). But the whole period is small, and the consistency is just okay.
Overall, keep your expectations low. The surf is tiny, the wind is often strong, and the energy is mostly weak. For a beginner, it’s fine—the 1ft to 2ft stuff is safe. But for anyone else, it’s a waiting game. If the swell direction was more favourable (the optimum is WSW but we’re getting mostly S to SSW), we’d be in better shape. As it is, the 21st and 27th are your best bets, but don’t expect a classic.
Rusty.
Short Range ForecastMostly dry. Warm (max 28°C on Fri afternoon, min 25°C on Wed morning). Wind will be generally light. | Days 4-6 Weather SummaryModerate rain (total 11mm), heaviest on Mon morning. Warm (max 29°C on Sat morning, min 25°C on Mon morning). Winds increasing (light winds from the E on Sat morning, strong winds from the NE by Sun night). | ||||||||||||||||||||
Wednesday 19 | Thursday 20 | Friday 21 | Saturday 22 | Sunday 23 | Monday 24 | Tuesday 25 | |||||||||||||||
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) | SSW 16 | SW 16 | SW 16 | SSW 18 | SSW 17 | SW 16 | SW 16 | SW 16 | SW 16 | SSW 15 | SW 15 | SSW 15 | SSW 15 | SSW 16 | SW 14 | SSW 14 | SSW 13 | SSW 13 | SSW 16 | SSW 16 | SSW 15 |
Wave Graph  | |||||||||||||||||||||
 kJ | 103 | 71 | 129 | 207 | 202 | 278 | 219 | 119 | 261 | 152 | 116 | 152 | 144 | 137 | 100 | 145 | 156 | 127 | 146 | 140 | 167 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | off | off | off | glassy | glassy | off | cross-off | cross-off | off | cross-off | off | off | off | off | cross-off | cross-off | off | cross-off | cross-off | cross-off | cross-off |
High Tide | 10:09AM0.39m | 12:36PM0.42m | 1:29PM0.46m | 2:01PM0.50m | 11:48PM0.23m | 2:28PM0.53m | 1:03AM0.27m | 2:51PM0.56m | 1:46AM0.30m | 3:14PM0.58m | 2:23AM0.34m | ||||||||||
Low Tide | 1:51AM0.07m | 3:14AM0.08m | 5:09AM0.07m | 9:42PM0.17m | 6:20AM0.05m | 9:13PM0.16m | 7:07AM0.02m | 9:16PM0.15m | 7:45AM0.01m | 9:28PM0.13m | |||||||||||
 | |  |  | | | | |  | | | | | |  |  | |  | | | | |
 | 6:05 | — | — | 6:05 | — | — | 6:05 | — | — | 6:07 | — | — | 6:07 | — | — | 6:07 | — | — | 6:07 | — | — |
 | — | 6:52 | — | — | 6:51 | — | — | 6:50 | — | — | 6:50 | — | — | 6:49 | — | — | 6:47 | — | — | 6:46 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 1 | 5 | 4 | 1 | — | 2 | — |
Temp °C | 27 | 27 | 26 | 27 | 27 | 26 | 27 | 28 | 27 | 29 | 29 | 27 | 27 | 28 | 27 | 26 | 26 | 26 | 27 | 28 | 27 |
Feels °C | 30 | 29 | 28 | 30 | 31 | 29 | 30 | 31 | 29 | 30 | 28 | 27 | 25 | 25 | 22 | 27 | 27 | 27 | 29 | 30 | 29 |
Swell 1 Height (m) Direction Period (s) | E 8 | E 8 | E 8 | E 8 | SSW 17 | SW 16 | SW 16 | SW 16 | SW 16 | SSW 15 | SW 15 | SSW 15 | SSW 15 | SSW 16 | SW 14 | SSW 14 | SSW 13 | SSW 13 | SSW 12 | SSW 12 | SSW 15 |
| kJ | 107 | 104 | 76 | 40 | 202 | 278 | 219 | 119 | 261 | 152 | 116 | 152 | 144 | 137 | 100 | 145 | 156 | 127 | 117 | 82 | 167 |
Swell 2 Height (m) Direction Period (s) | S 12 | S 12 | SW 16 | SSW 18 | E 7 | E 8 | W 10 | W 11 | W 10 | S 12 | WNW 10 | ESE 12 | SSW 16 | SW 14 | SSW 15 | SSE 12 | SSW 18 | S 7 | SSW 16 | SSW 16 | SSW 12 |
| kJ | 69 | 71 | 129 | 207 | 40 | 28 | 33 | 57 | 52 | 48 | 36 | 58 | 51 | 54 | 71 | 29 | 61 | 21 | 146 | 140 | 79 |
Swell 3 Height (m) Direction Period (s) | SSW 16 | SW 16 | S 12 | S 11 | S 11 | W 10 | S 11 | SSW 18 | S 13 | WNW 10 | S 12 | S 12 | S 11 | S 11 | SSE 13 | SSW 18 | SSE 8 | SSW 17 | S 6 | SSW 19 | S 18 |
| kJ | 103 | 65 | 45 | 21 | 21 | 32 | 37 | 66 | 54 | 34 | 46 | 44 | 23 | 22 | 33 | 32 | 11 | 92 | 7 | 74 | 165 |
Wind waves Height (m) Direction Period (s) | — | E 8 | E 8 | — | — | NE 7 | E 5 | E 5 | E 5 | E 6 | E 6 | E 9 | E 12 | E 12 | E 8 | E 8 | E 8 | E 8 | E 8 | E 8 | E 5 |
| kJ | — | 153 | 118 | — | — | 45 | 45 | 35 | 108 | 163 | 301 | 450 | 1344 | 1846 | 1088 | 1131 | 961 | 632 | 418 | 364 | 124 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 34 | 103 | 103 | 11 | 0 | 0 | 0 | 0 |
Best forecast wave conditions in Maui | |||||||||||||||||||||
Best forecast wave conditions in United States | |||||||||||||||||||||
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The surf report / weather widget below is available to embed on third party websites free of charge and provides a summary of our Big Beach surf forecast. Simply grab the html code snippet that we provide and paste it into your own site. You can choose your preferred language and metric/imperial units for the surf forecast feed to suit users of your site. Click here to get the code.
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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