Surf Forecasts:
Sandy Beach surf forecast from 13 Aug 2026:
- Most powerful swell: Sunday 16 Aug, 2AM (local time) - 13ft (4.0m), 9s period, E swell with 2,997 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 4.0m 9s and forecast to arrive on Sunday (Aug 16) at 2AM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.6m 6s period and expected on Wednesday (Aug 19) at 5AM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 2AM (Sun 16th Aug) | 13ft (4.0m) 9s |
Table - best surf conditions forecast for Sandy Beach over the next 16 days.
The Lowdown
Alright, Rusty here. We’ve got a pretty grim outlook for Sandy Beach this time around. Look, for a spot that’s normally on the cards, this 16-day window is about as quiet as it gets. We’re looking at a solid run of poor conditions, which is a real shame for a beach and reef setup like this.
The first potential surf of note won't arrive until Thursday the 13th of August, and even then, it’s a mess. The swell is coming in from the south at about 3 ft, with a long 16-second period, which is nice deep-water energy (847 combined energy), but the wind is howling from the NE at 22 mph. That’s a cross-shore mess, creating lumpy cross-chop. The water temp is about average for this time of year, but with that wind, you won't feel it—you’ll just be fighting the conditions.
Moving into Friday the 14th, the swell jumps to 7 ft from the ENE, but the period drops to a short 8 seconds. That’s a windswell, and when you mix it with a 25 mph cross-shore from the NE, it turns into a choppy, blown-out wall. Not worth a paddle. The energy is moderate, around 937, but the quality is zero.
The weekend of the 15th and 16th gets rough. Saturday the 15th sees an 12 ft swell from the east, with a period of 9 seconds and a near gale force wind of 31 mph. The combined energy is strong at 1969 to 2281, but this is pure chaos. For a beach and reef setup with that much onshore cross energy, this setup looks way more interesting for kite surfing than paddle surfing. Sunday the 16th drops a bit to 8 ft, but the wind sticks at 31 mph, with a risk of thunderstorms.
The whole second week, from the 18th through to the 27th of August, is a write-off. We see long-period southern groundswells (14-18 seconds) popping up, around 2 ft to 5 ft, but every day is plagued by fresh to strong cross-shore winds. The energy is weak to moderate (135 to 623), but the wind just won't let up. For a spot that’s exposed, it’s a constant stream of lumpy cross-chop and messy conditions.
The only tiny glimmer is right at the end, into Friday the 28th of August, with a 7 ft ENE swell, but that's still arriving with a fresh cross-onshore wind and a short 7-second period. It’s more of the same.
There are no standouts, no hidden gems. I’d leave the board in the car, maybe go for a drive and check the coast, but honestly, for Sandy Beach, this is a blank run. It tends not to stay this poor for long, but right now, it’s a solid bust.
Rusty out.
Short Range ForecastMostly dry. Warm (max 26°C on Thu morning, min 25°C on Thu afternoon). Winds increasing (fresh winds from the NE on Thu morning, near gales from the ENE by Sat morning). | Days 4-6 Weather SummaryModerate rain (total 10mm), heaviest on Sun night. Warm (max 26°C on Sun morning, min 25°C on Sun morning). Winds decreasing (strong winds from the ENE on Sun morning, moderate winds from the ENE by Tue night). | ||||||||||||||||||||
Thursday 13 | Friday 14 | Saturday 15 | Sunday 16 | Monday 17 | Tuesday 18 | Wednesday 19 | |||||||||||||||
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 16 | S 15 | E 8 | ENE 8 | ENE 8 | ENE 8 | E 9 | E 9 | E 9 | ENE 9 | ENE 8 | ENE 8 | ENE 7 | S 14 | ENE 7 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | E 8 |
Wave Graph | |||||||||||||||||||||
501 | 662 | 551 | 589 | 464 | 1072 | 1708 | 2184 | 2997 | 1274 | 763 | 416 | 302 | 260 | 170 | 169 | 155 | 159 | 167 | 149 | 63 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross-on | cross-on | cross-on | cross-on | cross | cross-on | cross | cross | cross | cross | cross | cross |
High Tide | 3:49PM0.71m | 4:15AM0.41m | 4:22PM0.64m | 5:04AM0.45m | 4:53PM0.55m | 5:55AM0.48m | 5:21PM0.47m | 6:52AM0.50m | 5:48PM0.38m | 7:56AM0.52m | 6:10PM0.31m | 9:08AM0.53m | |||||||||
Low Tide | 9:11AM0.01m | 10:50PM0.04m | 10:01AM0.07m | 11:17PM0.04m | 10:54AM0.13m | 11:44PM0.05m | 11:53AM0.20m | 00:11AM0.05m | 1:08PM0.25m | 00:39AM0.07m | 2:59PM0.27m | 1:14AM0.09m | 2:00AM0.10m | ||||||||
6:07 | — | — | 6:07 | — | — | 6:09 | — | — | 6:09 | — | — | 6:09 | — | — | 6:09 | — | — | 6:09 | — | — | |
— | 7:01 | — | — | 7:00 | — | — | 7:00 | — | — | 7:00 | — | — | 6:59 | — | — | 6:58 | — | — | 6:57 | — | |
mm | — | — | — | — | — | — | — | — | — | 1 | 2 | 7 | — | — | — | — | — | — | — | — | — |
Temp °C | 26 | 26 | 25 | 25 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 25 | 25 | 25 | 25 | 26 | 25 | 25 | 25 | 25 |
Feels °C | 23 | 23 | 22 | 21 | 23 | 23 | 21 | 22 | 21 | 22 | 24 | 26 | 23 | 22 | 22 | 23 | 24 | 23 | 24 | 24 | 24 |
Swell 1 Height (m) Direction Period (s) | S 16 | S 15 | S 15 | S 14 | S 14 | S 14 | S 13 | S 13 | S 13 | ENE 9 | S 10 | S 7 | S 14 | S 14 | S 13 | S 13 | S 13 | S 13 | SSW 16 | S 12 | NE 7 |
501 | 662 | 537 | 411 | 411 | 306 | 222 | 168 | 176 | 1274 | 627 | 77 | 264 | 260 | 170 | 165 | 119 | 116 | 103 | 45 | 46 | |
Swell 2 Height (m) Direction Period (s) | SSW 12 | W 12 | W 11 | W 12 | E 11 | W 11 | W 11 | W 13 | S 18 | SSE 11 | S 16 | S 14 | S 6 | SSE 6 | E 9 | SW 17 | SW 18 | SW 18 | S 12 | SW 16 | E 8 |
113 | 11 | 10 | 11 | 62 | 9 | 10 | 30 | 56 | 416 | 127 | 250 | 18 | 12 | 24 | 74 | 80 | 79 | 44 | 65 | 63 | |
Swell 3 Height (m) Direction Period (s) | W 12 | SW 19 | SW 18 | SW 18 | W 12 | SW 17 | SW 17 | S 19 | W 13 | S 16 | W 12 | S 16 | SW 18 | SSW 19 | SSE 5 | SSE 6 | SSE 7 | W 12 | NE 8 | SSE 9 | SW 16 |
11 | 14 | 13 | 12 | 11 | 12 | 11 | 65 | 30 | 130 | 25 | 81 | 50 | 37 | 5 | 4 | 9 | 25 | 15 | 16 | 129 | |
Wind waves Height (m) Direction Period (s) | ENE 6 | ENE 7 | E 8 | ENE 8 | ENE 8 | ENE 8 | E 9 | E 9 | E 9 | — | ENE 8 | ENE 8 | ENE 7 | ENE 7 | ENE 7 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | — |
203 | 278 | 551 | 589 | 464 | 1072 | 1708 | 2184 | 2997 | — | 763 | 416 | 302 | 208 | 163 | 169 | 155 | 159 | 167 | 149 | — | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 59 | 59 | 50 | 59 | 111 | 217 | 140 | 140 | 132 | 114 | 63 | 47 | 55 | 55 | 47 | 47 | 48 | 16 | 16 | 16 | 16 |
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.











