
Surf Forecasts:
Sandy Beach surf forecast from 8 Aug 2026:
- Most powerful swell: Saturday 15 Aug, 2PM (local time) - 23ft (7.0m), 12s period, E swell with 13,402 kJ wave energy.
Best Forecast Surf Conditions for Sandy Beach this week:
The most powerful waves expected at Sandy Beach in the next 16 days are 7.0m 12s and forecast to arrive on Saturday (Aug 15) at 2PM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.5m 18s period and expected on Saturday (Aug 08) at 11AM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 2PM (Sat 15th Aug) | 23ft (7.0m) 12s |
Table - best surf conditions forecast for Sandy Beach over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let’s be honest, the next couple of weeks at Sandy Beach are looking like a scratchy, frustrating stretch. We’ve got a solid run of cross-shore and onshore winds that are going to chop up whatever comes through. For the first week, from the 8th through the 14th, there’s surf, but it’s messy. Chest to head-high waves, but with a fresh cross-breeze on ’em, it’s gonna be lumpy and hard to find a clean line. The energy is moderate, running from a few hundred up into the low thousands, but there’s no shape to it. Water temp is 80°, which is pretty normal for this time of year.
Now, here’s the one that gets your heart racing. The 15th of August. A big, powerful east swell is forecast, and the wind actually eases a bit. The energy readings are huge, over 40000. That’s some serious, serious power. But here’s the problem: size. By Saturday afternoon, that swell is predicted to be at 33 feet. That is way, way too big for Sandy Beach. It’s a beach and reef setup, and at that size, it’s just going to be a full-on maelstrom. The wind might be favorable, but the swell is too big for this break. It’s a real shame, because it would be epic if it was half that size.
Right after that, the swell drops, but the wind stays on it. From the 16th to the 18th, we’re back to cross-shore breezes with a dropping swell, so it stays messy. There’s some long-period south groundswell, but it’s coming through a cross-breeze, so it won’t be clean.
The 19th gives us a small break. For one morning, we get a gentle breeze from the southeast, which is onshore but light. The swell is small, around 4 feet from the east-northeast with a short 7-second period. It’s not going to be great, but it might clean up the surface a touch. That’s about the best we can say for it.
The rest of the run into the 23rd is more of the same – moderate cross-shore winds and weak, grovelly surf. The energy is weak to moderate, and it’s not looking like it’ll turn on.
So, plain and simple, there’s not a single day in this whole 16-day window that I’d be waxing up for with excitement. The closest we get to something interesting is that 15th, but it’s just too big. For the rest, you’re fighting the wind more than you’re riding waves. If the wind ever lays down, it could turn on, but as it stands, we’re in a waiting game.
Rusty out.
Short Range ForecastMostly dry. Warm (max 26°C on Sat morning, min 25°C on Sat morning). Mainly fresh winds. | Days 4-6 Weather SummaryMostly dry. Warm (max 26°C on Tue morning, min 25°C on Tue morning). Mainly strong winds. | ||||||||||||||||||||
Saturday 8 | Sunday 9 | Monday 10 | Tuesday 11 | Wednesday 12 | Thursday 13 | Friday 14 | |||||||||||||||
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) | ENE 6 | ENE 6 | E 7 | ENE 7 | ENE 8 | ENE 7 | ENE 7 | ENE 7 | E 7 | ENE 7 | SSW 14 | S 20 | S 18 | S 18 | S 16 | S 16 | S 15 | ENE 8 | ENE 8 | ENE 8 | ENE 10 |
Wave Graph | |||||||||||||||||||||
125 | 172 | 99 | 254 | 250 | 301 | 252 | 259 | 286 | 208 | 269 | 276 | 509 | 498 | 520 | 734 | 662 | 623 | 783 | 1168 | 2756 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross | cross-on | cross | cross | cross-on | cross | cross | cross-on | cross | cross | cross-on | cross | cross | cross | cross | cross | cross | cross | cross | cross |
High Tide | 12:21PM0.73m | 00:00AM0.20m | 1:10PM0.77m | 1:01AM0.23m | 1:55PM0.79m | 1:52AM0.27m | 2:36PM0.79m | 2:40AM0.31m | 3:14PM0.76m | 3:27AM0.36m | 3:49PM0.71m | 4:15AM0.41m | 4:22PM0.64m | ||||||||
Low Tide | 8:16PM0.11m | 5:38AM-0.02m | 8:50PM0.08m | 6:37AM-0.03m | 9:21PM0.06m | 7:31AM-0.04m | 9:52PM0.05m | 8:22AM-0.02m | 10:21PM0.04m | 9:11AM0.01m | 10:50PM0.04m | 10:01AM0.07m | 11:17PM0.04m | ||||||||
6:05 | — | — | 6:07 | — | — | 6:07 | — | — | 6:07 | — | — | 6:07 | — | — | 6:07 | — | — | 6:07 | — | — | |
— | 7:05 | — | — | 7:05 | — | — | 7:04 | — | — | 7:02 | — | — | 7:02 | — | — | 7:01 | — | — | 7:00 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 26 | 26 | 25 | 25 | 26 | 25 | 26 | 26 | 26 | 26 | 25 | 25 | 25 | 25 | 26 | 26 | 26 | 26 | 26 | 26 | 26 |
Feels °C | 24 | 23 | 22 | 23 | 24 | 23 | 25 | 24 | 25 | 24 | 23 | 23 | 24 | 21 | 23 | 23 | 22 | 22 | 23 | 22 | 22 |
Swell 1 Height (m) Direction Period (s) | SSW 14 | SSW 13 | E 7 | SSW 17 | SSW 12 | SSW 16 | SSW 15 | SSW 15 | SSW 15 | SSW 14 | SSW 14 | SSW 14 | S 18 | S 18 | S 16 | S 16 | S 15 | S 15 | S 14 | ESE 14 | ESE 14 |
113 | 101 | 92 | 186 | 86 | 198 | 184 | 176 | 186 | 165 | 269 | 243 | 509 | 498 | 520 | 734 | 662 | 537 | 416 | 492 | 765 | |
Swell 2 Height (m) Direction Period (s) | SW 18 | SW 18 | SSW 13 | SSW 13 | SSW 16 | SSW 12 | SSW 12 | SSW 11 | SSW 11 | SSW 11 | SE 9 | S 20 | SSW 13 | SSW 13 | SSW 13 | W 12 | W 12 | W 11 | ESE 13 | S 14 | S 14 |
162 | 154 | 99 | 96 | 102 | 56 | 56 | 42 | 23 | 40 | 20 | 276 | 218 | 218 | 170 | 11 | 11 | 10 | 165 | 333 | 239 | |
Swell 3 Height (m) Direction Period (s) | NE 10 | SSE 10 | SW 18 | SSE 10 | SSW 18 | W 11 | SSE 10 | SE 10 | SSE 9 | SSE 9 | S 21 | SSE 9 | W 13 | W 12 | W 12 | SE 10 | SW 19 | SW 18 | W 12 | SSW 18 | W 11 |
17 | 19 | 150 | 19 | 102 | 20 | 19 | 23 | 17 | 16 | 79 | 7 | 30 | 25 | 11 | 4 | 14 | 13 | 11 | 30 | 9 | |
Wind waves Height (m) Direction Period (s) | ENE 6 | ENE 6 | NE 7 | ENE 7 | ENE 8 | ENE 7 | ENE 7 | ENE 7 | E 7 | ENE 7 | ENE 7 | ENE 6 | ENE 6 | ENE 6 | ENE 7 | ENE 7 | ENE 7 | ENE 8 | ENE 8 | ENE 8 | ENE 10 |
125 | 172 | 86 | 254 | 250 | 301 | 252 | 259 | 286 | 208 | 167 | 194 | 160 | 170 | 342 | 285 | 360 | 623 | 783 | 1168 | 2756 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 47 | 57 | 47 | 47 | 110 | 47 | 47 | 47 | 20 | 47 | 55 | 18 | 47 | 110 | 47 | 111 | 63 | 111 | 217 | 217 | 141 |
Best forecast wave conditions in Oahu | |||||||||||||||||||||
Best forecast wave conditions in United States | |||||||||||||||||||||
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Information about the Sandy Beach Surf forecast
The above surf forecast table for Sandy Beach provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Sandy Beach can be found by selecting the local surf guide option on the grey menu. Our Sandy 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 (Sandy 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 Sandy 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.
Sandy's Beach is 15 km (9 miles) from the city of Kailua. If you plan a vacation in Oahu, look for hotels and other accommodation in Kailua. Kailua has rooms for a wide range of budgets as well as car hire and transport links.











