Surf Forecasts:
Sandy Beach surf forecast from 17 Jul 2026:
- Most powerful swell: Thursday 23 Jul, 11PM (local time) - 3ft (0.9m), 19s period, SSW swell with 560 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 0.9m 19s and forecast to arrive on Thursday (Jul 23) at 11PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.6m 14s period and expected on Friday (Jul 17) at 11AM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 11PM (Thu 23rd Jul) | 3ft (0.9m) 19s |
Table - best surf conditions forecast for Sandy Beach over the next 16 days.
The Lowdown
Alright, let's talk in feet and miles an hour. Rusty here, and the 16-day picture for Sandy Beach is a tough one to swallow. For the first week and a half, you can forget about it. The first real chance of a wave doesn't show up until the morning of Monday, July 28th.
The wind is just relentless. It's almost always a fresh breeze from the ENE, tearing the surface of the water into a lumpy, cross-chop mess. The water temp is a normal 80°F, but that's the only thing that's normal. The combined swell energy is weak to moderate for the first part of the window, but it's the constant wind that's ruining everything.
The one shining moment, if you can call it that, is the morning of Tuesday, July 29th. The combined energy finally surges to a strong level (3062). We're looking at an 8ft groundswell from the ENE, with a period of 14 seconds. That's a lot of raw power. The wind is still a moderate cross-shore from the NE, but it's the best we'll see in the whole 16 days. This is a serious, heavy wave. With a period that long, it'll hold up better on the reef than just a beach break, but those sets will be far apart. That wave height is firmly in the "experts only" zone. The direction is spot-on for the optimum, so the breaks will be working. Crowds are a given here, so be ready for a lineup.
After that, it's all downhill. The wind picks back up to a fresh breeze, and the swell drops away to around 5ft to 6ft for the rest of the second week. The energy fades, and the surface stays messy.
So, the bottom line: the only real bet is the morning of Tuesday, July 29th, and it's a heavy-duty, expert-only swell. The rest of the window is a no-go. It's a rough one.
Rusty.
Short Range ForecastMostly dry. Warm (max 26°C on Fri afternoon, min 24°C on Sat night). Mainly strong winds. | Days 4-6 Weather SummaryMostly dry. Warm (max 25°C on Mon morning, min 24°C on Mon morning). Mainly fresh winds. | ||||||||||||||||||||
Friday 17 | Saturday 18 | Sunday 19 | Monday 20 | Tuesday 21 | Wednesday 22 | Thursday 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) | ENE 6 | SSW 16 | ENE 7 | ENE 7 | ENE 8 | ENE 8 | ENE 7 | ENE 8 | ENE 8 | ENE 8 | S 16 | S 15 | S 14 | S 14 | S 13 | SSW 24 | SSW 23 | SSW 22 | SSW 20 | SSW 20 | SSW 18 |
Wave Graph  | |||||||||||||||||||||
 kJ | 130 | 196 | 189 | 316 | 346 | 357 | 225 | 243 | 232 | 191 | 321 | 339 | 329 | 307 | 273 | 317 | 426 | 363 | 412 | 395 | 464 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross | cross-on | cross-on | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross-on | cross | cross | cross-on | cross | cross | cross-on |
High Tide | 5:35PM0.64m | 6:37AM0.35m | 6:10PM0.55m | 7:46AM0.40m | 6:42PM0.45m | 8:59AM0.45m | 7:13PM0.37m | 10:08AM0.51m | 7:46PM0.29m | 11:08AM0.55m | 8:50PM0.23m | 11:59AM0.59m | 10:38PM0.19m | ||||||||
Low Tide | 10:55AM0.08m | 00:53AM0.03m | 11:55AM0.16m | 1:26AM0.03m | 1:10PM0.23m | 1:58AM0.03m | 2:57PM0.28m | 2:33AM0.04m | 5:25PM0.28m | 3:12AM0.05m | 7:38PM0.23m | 3:57AM0.05m | 8:24PM0.18m | ||||||||
 |  |  | | | | | |  | | | | | | | | | | | |  | |
 | 5:58 | — | — | 5:58 | — | — | 5:58 | — | — | 5:58 | — | — | 5:58 | — | — | 6:00 | — | — | 6:00 | — | — |
 | — | 7:15 | — | — | 7:15 | — | — | 7:14 | — | — | 7:14 | — | — | 7:14 | — | — | 7:13 | — | — | 7:13 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 2 |
Temp °C | 25 | 26 | 25 | 26 | 25 | 24 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 |
Feels °C | 25 | 24 | 24 | 23 | 21 | 21 | 22 | 22 | 23 | 23 | 23 | 23 | 24 | 24 | 23 | 23 | 23 | 23 | 22 | 22 | 22 |
Swell 1 Height (m) Direction Period (s) | W 14 | SSW 16 | SSW 14 | SSW 13 | SSW 14 | S 12 | S 12 | S 13 | SSW 12 | S 14 | S 16 | ENE 7 | ENE 7 | S 14 | S 13 | S 13 | E 11 | S 13 | SSW 20 | SSW 20 | SSW 18 |
| kJ | 144 | 196 | 147 | 141 | 158 | 112 | 73 | 89 | 44 | 142 | 321 | 168 | 108 | 307 | 273 | 126 | 191 | 155 | 412 | 395 | 464 |
Swell 2 Height (m) Direction Period (s) | SW 16 | W 14 | W 13 | WNW 13 | WNW 13 | W 13 | S 19 | S 18 | S 18 | S 16 | SW 18 | S 15 | S 14 | SW 16 | E 11 | S 11 | S 13 | SSW 22 | E 12 | S 11 | S 11 |
| kJ | 125 | 98 | 90 | 57 | 56 | 28 | 66 | 106 | 97 | 135 | 81 | 339 | 329 | 68 | 61 | 83 | 272 | 363 | 103 | 125 | 56 |
Swell 3 Height (m) Direction Period (s) | SSW 12 | SSW 12 | SW 15 | SE 8 | SSE 9 | SSE 9 | W 12 | SSE 6 | NE 8 | SW 18 | W 12 | SW 16 | E 12 | E 11 | SW 15 | SSW 24 | SSW 23 | E 12 | S 12 | SW 16 | S 13 |
| kJ | 55 | 55 | 58 | 17 | 8 | 15 | 25 | 7 | 15 | 83 | 11 | 69 | 45 | 40 | 60 | 317 | 426 | 108 | 97 | 127 | 85 |
Wind waves Height (m) Direction Period (s) | ENE 6 | ENE 7 | ENE 7 | ENE 7 | ENE 8 | ENE 8 | ENE 7 | ENE 8 | ENE 8 | ENE 8 | ENE 7 | — | E 7 | ENE 7 | ENE 7 | ENE 7 | — | ENE 6 | ENE 6 | ENE 6 | E 7 |
| kJ | 130 | 154 | 189 | 316 | 346 | 357 | 225 | 243 | 232 | 191 | 169 | — | 65 | 117 | 132 | 121 | — | 170 | 139 | 176 | 377 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 47 | 55 | 16 | 55 | 55 | 50 | 47 | 48 | 16 | 47 | 47 | 16 | 47 | 19 | 47 | 47 | 47 | 47 | 48 | 110 | 47 |
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.
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