Surf Forecasts:
Sandy Beach surf forecast from 7 Aug 2026:
- Most powerful swell: Thursday 13 Aug, 2AM (local time) - 4ft (1.2m), 16s period, S swell with 762 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 1.2m 16s and forecast to arrive on Thursday (Aug 13) at 2AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.5m 14s period and expected on Thursday (Aug 06) at 11PM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 2AM (Thu 13th Aug) | 4ft (1.2m) 16s |
Table - best surf conditions forecast for Sandy Beach over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let's get into it. We've got a pretty bleak run ahead at Sandy Beach. The whole 16-day window is one long stretch of poor surf conditions, so I'm not going to pick any standouts because there just aren't any. The first record we see is for the morning of the 6th of August, and it's not good.
The pattern is grim from the start. We kick off on Thursday the 6th of August with tiny, weak swell and a fresh cross-shore wind at 19 mph. The water's sitting at 80°F, which is about average for the time of year, but you won't care about that because the surf is flat and messy. That same story repeats through Friday and Saturday. By Saturday the 8th, we see a bit of a bump in size to 5ft, but the period is short at 7 seconds and the wind is still hammering it cross-shore at 22 mph. The wave energy is moderate at best (311), but the quality is just rubbish.
This continues day after day. The wind stays locked in from the ENE, almost always 19 to 28 mph, and it's always cross-shore. Even when the swell size pushes up—like on the 14th of August, where we see 8ft swell—the period remains short (7-8 seconds) and the wind is a strong breeze at 25 mph. The wave energy gets strong (1112), but the comment says it all: "poor surf conditions." For an exposed beach and reef setup like this, with that much wind and short-period chop, it's honestly looking more interesting for kite surfing than paddle surfing through the second week. By the 16th of August, the swell hits 10ft with a 9-second period and strong breeze cross-shore—way too big and blown out for beginners and not fun for anyone else.
There are no gaps of good surf to describe, just a solid 16-day block of onshore junk. The whole forecast is a write-off. Sandy Beach is a fairly consistent spot, so this is a frustrating stretch. It can't stay this poor forever, but for now, leave the boards in the shed.
Rusty.
Short Range ForecastMostly dry. Warm (max 26°C on Sat morning, min 25°C on Thu morning). Mainly fresh winds. | Days 4-6 Weather SummaryMostly dry. Warm (max 26°C on Mon morning, min 25°C on Sun morning). Mainly fresh winds. | ||||||||||||||||||||
Thursday 6 | Friday 7 | Saturday 8 | Sunday 9 | Monday 10 | Tuesday 11 | Wednesday 12 | |||||||||||||||
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 8 | ENE 8 | SSW 14 | SSW 14 | ENE 6 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 8 | ENE 7 | ENE 7 | SSW 14 | S 20 | S 18 | S 18 | S 16 |
Wave Graph  | |||||||||||||||||||||
 kJ | 81 | 142 | 107 | 77 | 73 | 148 | 181 | 268 | 278 | 222 | 314 | 286 | 259 | 204 | 193 | 188 | 269 | 276 | 509 | 498 | 762 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross | cross | cross | cross | cross-on | cross | cross | cross | cross | cross | cross-on | cross | cross | cross-on | cross | cross | cross-on | cross | cross | cross-on |
High Tide | 10:22AM0.61m | 8:39PM0.22m | 11:25AM0.67m | 10:36PM0.19m | 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 | |||||||
Low Tide | 6:43PM0.21m | 3:25AM0.02m | 7:38PM0.16m | 4:32AM0.00m | 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 | ||||||||
 |  |  | | | | | | | | | | | | | | | | | |  | |
 | 6:05 | — | — | 6:05 | — | — | 6:05 | — | — | 6:07 | — | — | 6:07 | — | — | 6:07 | — | — | 6:07 | — | — |
 | — | 7:06 | — | — | 7:06 | — | — | 7:05 | — | — | 7:05 | — | — | 7:04 | — | — | 7:02 | — | — | 7:02 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 25 | 25 | 25 | 25 | 25 | 25 | 26 | 26 | 25 | 25 | 25 | 25 | 26 | 26 | 25 | 26 | 26 | 25 | 25 | 26 | 26 |
Feels °C | 24 | 24 | 24 | 24 | 23 | 24 | 24 | 23 | 23 | 23 | 23 | 23 | 26 | 25 | 24 | 25 | 24 | 23 | 23 | 23 | 24 |
Swell 1 Height (m) Direction Period (s) | ENE 8 | SSW 14 | SW 14 | SSW 14 | SSW 14 | SSW 14 | SSW 14 | SSW 13 | SSW 13 | SSW 17 | SSW 12 | SSW 16 | ENE 7 | SSW 16 | ENE 7 | SSW 14 | SSW 14 | ENE 7 | S 18 | S 18 | S 16 |
| kJ | 59 | 80 | 102 | 77 | 73 | 105 | 113 | 101 | 99 | 159 | 86 | 198 | 259 | 191 | 193 | 165 | 269 | 131 | 509 | 498 | 762 |
Swell 2 Height (m) Direction Period (s) | SSW 14 | S 11 | SSE 11 | SW 21 | SW 20 | SSW 19 | SW 18 | SW 18 | SW 18 | SSW 13 | SSW 16 | SSW 12 | SSW 15 | SSE 9 | SSW 15 | SSE 9 | SSE 8 | SSW 14 | SSW 13 | SSW 13 | W 12 |
| kJ | 81 | 22 | 40 | 115 | 99 | 148 | 162 | 154 | 150 | 96 | 102 | 56 | 184 | 33 | 186 | 31 | 28 | 243 | 218 | 218 | 11 |
Swell 3 Height (m) Direction Period (s) | SSE 11 | SSW 10 | NNW 7 | SSE 11 | S 11 | NE 11 | NE 10 | SSE 10 | SSE 10 | NE 9 | SSW 18 | SSE 10 | SSW 12 | SSW 11 | SSE 9 | SSW 11 | S 21 | S 20 | SSE 8 | W 12 | SE 9 |
| kJ | 25 | 9 | 5 | 23 | 20 | 30 | 17 | 19 | 19 | 13 | 102 | 19 | 56 | 49 | 32 | 40 | 79 | 276 | 13 | 25 | 3 |
Wind waves Height (m) Direction Period (s) | ENE 6 | ENE 8 | ENE 8 | ENE 5 | ENE 5 | ENE 6 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | — | ENE 8 | — | ENE 7 | ENE 7 | — | ENE 6 | ENE 6 | ENE 6 |
| kJ | 62 | 142 | 107 | 51 | 66 | 139 | 181 | 268 | 278 | 222 | 314 | 286 | — | 204 | — | 188 | 171 | — | 127 | 104 | 155 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 47 | 47 | 16 | 47 | 47 | 47 | 55 | 55 | 48 | 47 | 55 | 16 | 20 | 19 | 47 | 47 | 48 | 47 | 47 | 55 | 48 |
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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