Surf Forecasts:
Big Beach surf forecast from 17 Aug 2026:
- Best quality surf: Monday 17 Aug, 2PM (local time) - 2.5ft (0.8m), 14s period, S swell with cross-offshore winds.
- Most powerful swell: Friday 21 Aug, 8AM (local time) - 2.5ft (0.7m), 17s period, SW swell with 295 kJ wave energy.
- Next surfable swell (1★+): Monday 17 Aug, 2PM (local time) - 2.5ft (0.8m), 14s 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 Monday (Aug 17) at 2PM. The primary swell is predicted to be 0.8m and 14s period with a secondary swell of 0.2m and 19s. 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 0.7m 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 2.1m 6s period and expected on Monday (Aug 24) at 11AM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 2PM (Mon 17th Aug) | 2.5ft (0.8m) 14s |
| Best Surf | 2PM (Mon 17th Aug) | 2.5ft (0.8m) 14s |
| 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
Okay, folks, Rusty here. Let’s take a look at what the next couple of weeks have in store for us. It’s a bit of a slow burner, so don’t go getting too excited for the immediate future. We’ve got a lot of small, weak surf on the horizon, but there’s a real pulse of energy coming our way later on that should have the corners of your mouth turning up.
The first week is pretty flat, to be honest. We’re looking at a lot of days with waist-high mush or less. The highlight of this early stretch is probably Monday morning the 17th. We’ve got a 3ft south swell with a 14-second period, and the wind is offshore and light. The energy is moderate at 405, and it should be clean. It’s not going to blow anyone’s mind, but it’s the best of a pretty average bunch.
The rest of that week just kind of dribbles along. There’s nothing with any real push, and the swell direction is all over the shop. You’ll get the odd clean, glassy morning, like Thursday the 20th, but the waves are just too small to get excited about. It’s more of a longboard and cruise-around kind of vibe. The water temp is 80°, which is about average for this time of year, so a rashie will do you fine.
We get another little bump on Friday the 21st and Saturday the 22nd, but it’s still pretty small. A 2ft southwest swell with a 16-second period is promising, but it’s just not enough size. The energy is moderate, around 291, so there’s a bit of push there, but it’s fading fast by the afternoon.
After that, we hit a real dead patch. From the 23rd through the 26th, it’s just tiny, weak, and unremarkable. There are a few days of offshore winds, but with waves that small, it’s not worth the paddle. This is the kind of lull you just have to sit through. But don’t worry, the models are showing a proper groundswell on the horizon.
Then, the waiting pays off. Around Thursday the 27th of August, things start to wake up. We’ve got a new southwest swell building, and the energy numbers are climbing into the strong range. By Friday the 28th, we’re looking at a 6-7ft SSW swell with a 12-second period at Big Beach. The energy is a solid 1406, and the wind is offshore and moderate. This is the standout of the whole period. It’s going to be a proper day for the experienced crew. This is excellent surf, with some real power behind it.
Saturday the 29th holds that quality, with a 7ft SW swell and even more energy at 1341. Again, offshore winds and clean conditions. This is the window you’ve been waiting for. The southwest direction is perfect for this spot, and it’s going to have some real push. Just a heads-up, at this size, it’s more for the experts. Beginners should sit this one out and watch from the beach. It’s going to be a show.
After that, it starts to fade again. Sunday the 30th drops right back off, and the last couple of days of the forecast period are back to the small, weak stuff. So, the takeaway is this: don’t stress about the next week or so, it’s a write-off. Save your energy and your board for that Thursday through Saturday, the 27th to the 29th. That’s the one to circle on the calendar. It’s a long way out, so things can change, but right now it’s looking promising.
Rusty, signing off.
Short Range ForecastMostly dry. Warm (max 27°C on Mon afternoon, min 24°C on Mon night). Wind will be generally light. | Days 4-6 Weather SummaryLight rain (total 2mm), mostly falling on Fri afternoon. Warm (max 28°C on Sat morning, min 25°C on Thu night). Wind will be generally light. | ||||||||||||||||||||
Monday 17 | Tuesday 18 | Wednesday 19 | Thursday 20 | Friday 21 | Saturday 22 | Sunday 23 | |||||||||||||||
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) | S 14 | S 14 | S 13 | S 13 | S 13 | SW 18 | SW 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 |
Wave Graph | |||||||||||||||||||||
333 | 257 | 170 | 123 | 119 | 82 | 69 | 71 | 129 | 207 | 202 | 278 | 219 | 119 | 261 | 152 | 116 | 152 | 144 | 137 | 100 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | off | cross-off | off | cross-off | cross-off | off | cross-off | off | cross-off | glassy | glassy | off | cross-off | cross-off | off | cross-off | cross-off | off | off | off | off |
High Tide | 5:58PM0.42m | 8:09AM0.40m | 5:51PM0.38m | 10:09AM0.39m | 12:36PM0.42m | 1:29PM0.46m | 2:01PM0.50m | 11:48PM0.23m | 2:28PM0.53m | 1:03AM0.27m | |||||||||||
Low Tide | 12:13PM0.17m | 00:39AM0.06m | 1:00PM0.23m | 1:08AM0.06m | 1:51AM0.07m | 3:14AM0.08m | 5:09AM0.07m | 9:42PM0.17m | 6:20AM0.05m | 9:13PM0.16m | |||||||||||
6:05 | — | — | 6:05 | — | — | 6:05 | — | — | 6:05 | — | — | 6:05 | — | — | 6:07 | — | — | 6:07 | — | — | |
— | 6:52 | — | — | 6:52 | — | — | 6:52 | — | — | 6:51 | — | — | 6:50 | — | — | 6:50 | — | — | 6:49 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | 1 | 1 | — | — | — | — | — | — |
Temp °C | 26 | 27 | 25 | 26 | 27 | 25 | 27 | 27 | 25 | 27 | 27 | 26 | 27 | 27 | 27 | 28 | 28 | 27 | 27 | 27 | 25 |
Feels °C | 28 | 29 | 26 | 28 | 28 | 25 | 30 | 29 | 27 | 31 | 32 | 30 | 30 | 30 | 30 | 31 | 30 | 28 | 28 | 28 | 25 |
Swell 1 Height (m) Direction Period (s) | S 14 | S 14 | S 13 | S 13 | S 13 | S 13 | E 8 | E 8 | SW 16 | E 8 | E 7 | SW 16 | SW 16 | E 5 | SW 16 | SSW 15 | E 8 | SSW 15 | SSW 15 | SSW 16 | SW 14 |
333 | 257 | 170 | 123 | 119 | 82 | 84 | 82 | 129 | 54 | 40 | 278 | 219 | 17 | 261 | 152 | 64 | 152 | 144 | 137 | 100 | |
Swell 2 Height (m) Direction Period (s) | SW 18 | E 9 | W 11 | SW 17 | SW 18 | SW 18 | S 12 | S 12 | S 12 | SSW 18 | SSW 17 | E 7 | S 11 | SW 16 | S 13 | S 12 | SW 15 | S 12 | SSW 16 | SW 14 | SSW 15 |
50 | 15 | 10 | 74 | 79 | 79 | 69 | 71 | 45 | 207 | 202 | 25 | 37 | 119 | 54 | 47 | 116 | 44 | 51 | 54 | 71 | |
Swell 3 Height (m) Direction Period (s) | W 11 | W 11 | W 6 | W 11 | W 13 | W 12 | SW 16 | SW 16 | W 11 | S 11 | S 11 | S 11 | S 14 | S 11 | W 10 | SSW 16 | S 12 | WNW 10 | S 11 | S 11 | SSE 13 |
22 | 10 | 3 | 9 | 14 | 26 | 67 | 65 | 10 | 21 | 21 | 37 | 35 | 37 | 18 | 90 | 46 | 20 | 23 | 22 | 33 | |
Wind waves Height (m) Direction Period (s) | E 5 | E 8 | E 5 | E 8 | E 8 | E 8 | ENE 8 | E 8 | E 8 | E 4 | — | — | E 4 | E 5 | E 5 | E 6 | E 5 | E 6 | E 6 | E 6 | E 6 |
124 | 133 | 124 | 152 | 143 | 199 | 140 | 130 | 99 | 7 | — | — | 25 | 45 | 109 | 138 | 55 | 163 | 214 | 207 | 191 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 11 | 2 |
Best forecast wave conditions in Maui | |||||||||||||||||||||
Best forecast wave conditions in United States | |||||||||||||||||||||
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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.











