Surf Forecasts:
Kalapaki Beach surf forecast from 18 Aug 2026:
- Best quality surf: Friday 21 Aug, 2AM (local time) - 2.5ft (0.7m), 16s period, SW swell with cross-offshore winds.
- Most powerful swell: Monday 24 Aug, 8PM (local time) - 7ft (2.1m), 7s period, ENE swell with 431 kJ wave energy.
- Next surfable swell (1★+): Friday 21 Aug, 2AM (local time) - 2.5ft (0.7m), 16s period with SW swell.
Best Forecast Surf Conditions for Kalapaki Beach this week:
The surf forecast for Kalapaki Beach over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Friday (Aug 21) at 2AM. The primary swell is predicted to be 0.7m and 16s period with a secondary swell of 1.0m and 7s. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at Kalapaki Beach in the next 16 days are 2.1m 7s and forecast to arrive on Monday (Aug 24) at 8PM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.9m 7s period and expected on Friday (Aug 21) at 5PM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 2AM (Fri 21st Aug) | 2.5ft (0.7m) 16s |
| Best Surf | 2AM (Fri 21st Aug) | 2.5ft (0.7m) 16s |
| Most Powerful | 8PM (Mon 24th Aug) | 7ft (2.1m) 7s |
Table - best surf conditions forecast for Kalapaki Beach over the next 16 days.
The Lowdown
Alright, let’s take a look at what’s on the table for the next couple of weeks. I’m only working with the one spot here, so bear with me.
Right now, we’re looking at a pretty bleak run for Kalapaki Beach. The first few days are a write-off with poor surf conditions and choppy, cross-onshore wind from the east. There’s some swell but it’s messy and the wind is doing it no favours. No good until at least the second half of next week.
The only real glimmer comes around the Thursday 27th of August and into the start of September. On the Thursday afternoon, we see a 8ft swell from the east-northeast with a moderate cross-shore wind. The combined energy is moderate to strong (1134). That’s a bit of size, borderline for experts only, but the wind is cross-shore so it’s not totally wrecked. Then on Friday 28th August, we’ve got a 8ft swell from the east, still cross-shore, with moderate energy (1089). Same again Saturday morning – 8ft from the east-northeast, still cross-shore (1022). Those few days are the only faint pulse in an otherwise flat or choppy period.
Look, I’m not gonna sugarcoat it: Kalapaki Beach is not going to be any kind of standout. The water temperature is around 27°C, which is about average for the time of year. No anomaly there. The breaks only really worth mentioning because it’s the only game in town. The swell direction from the east-northeast and east isn’t aligning with the optimum SSE direction, and with the wind mostly cross or cross-onshore, you’re not getting clean faces. For beginners, swells over 5ft and especially up to 8ft are too big, and those bigger days are more for experienced crew only.
Overall, the only reasonable surf is that late August window – Thursday 27th to Saturday 29th – but even then it’s marginal and the wind will mess with it. Don’t get your hopes up.
Rusty
Short Range ForecastLight rain (total 3mm), mostly falling on Mon afternoon. Warm (max 26°C on Mon afternoon, min 24°C on Mon night). Wind will be generally light. | Days 5-7 Weather SummaryLight rain (total 2mm), mostly falling on Sat night. Warm (max 27°C on Fri afternoon, min 24°C on Thu night). Wind will be generally light. | |||||||||||||||||||
Mon 17 | Tuesday 18 | Wednesday 19 | Thursday 20 | Friday 21 | Saturday 22 | Sunday 23 | ||||||||||||||
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 7 | S 14 | ENE 7 | S 13 | S 13 | SW 16 | ENE 6 | SW 16 | SSW 18 | SSW 17 | SW 16 | SSW 17 | SW 16 | SSW 16 | SW 16 | SSW 16 | SSW 16 | ENE 7 | ENE 7 | ENE 7 |
Wave Graph  | ||||||||||||||||||||
 kJ | 349 | 233 | 165 | 165 | 112 | 129 | 103 | 130 | 207 | 195 | 278 | 255 | 258 | 322 | 261 | 220 | 218 | 255 | 230 | 223 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross | cross-on | cross | cross-on | cross-on | cross | cross | cross | cross | cross-off | cross-on | on | cross | cross-on | cross | cross | cross | cross | cross |
High Tide | 6:01PM0.36m | 8:46AM0.48m | 5:31PM0.30m | 10:06AM0.50m | 11:20AM0.53m | 12:20PM0.56m | 11:30PM0.20m | 1:07PM0.59m | 00:35AM0.22m | 1:46PM0.62m | 1:16AM0.25m | |||||||||
Low Tide | 00:55AM0.06m | 3:13PM0.30m | 1:28AM0.08m | 2:14AM0.09m | 3:21AM0.10m | 9:24PM0.19m | 9:13PM0.18m | 5:45AM0.08m | 9:16PM0.18m | |||||||||||
 |  |  |  | | | |  | | | | | | | | |  | | | | |
 | — | — | 6:16 | — | — | 6:16 | — | — | 6:16 | — | — | 6:16 | — | — | 6:16 | — | — | 6:16 | — | — |
 | 7:06 | — | — | 7:06 | — | — | 7:05 | — | — | 7:04 | — | — | 7:02 | — | — | 7:01 | — | — | 7:01 | — |
mm | 3 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 2 | — | — | — |
Temp °C | 26 | 25 | 26 | 26 | 25 | 25 | 26 | 24 | 26 | 26 | 25 | 26 | 27 | 26 | 26 | 27 | 25 | 26 | 26 | 25 |
Feels °C | 27 | 26 | 26 | 26 | 26 | 25 | 26 | 25 | 27 | 28 | 27 | 29 | 30 | 29 | 27 | 28 | 26 | 27 | 26 | 24 |
Swell 1 Height (m) Direction Period (s) | SSE 6 | S 14 | S 13 | S 13 | S 13 | NNE 7 | SSE 9 | SW 16 | NE 7 | SSW 17 | ENE 7 | E 7 | NE 7 | SSW 16 | SW 16 | SSW 16 | SSW 16 | SSW 15 | SSW 15 | SSW 14 |
| kJ | 36 | 232 | 165 | 165 | 112 | 31 | 33 | 130 | 47 | 195 | 111 | 51 | 69 | 322 | 261 | 220 | 212 | 196 | 188 | 183 |
Swell 2 Height (m) Direction Period (s) | S 12 | SE 6 | SSE 10 | SE 10 | SE 10 | S 12 | S 12 | SSE 9 | E 8 | E 8 | SW 16 | SSW 17 | SW 16 | W 10 | W 10 | WNW 11 | WNW 12 | S 13 | SE 9 | S 13 |
| kJ | 150 | 9 | 63 | 47 | 46 | 69 | 69 | 33 | 61 | 28 | 278 | 255 | 258 | 49 | 52 | 66 | 106 | 92 | 53 | 87 |
Swell 3 Height (m) Direction Period (s) | S 15 | SE 11 | SW 6 | SW 18 | WNW 12 | SW 16 | SSW 16 | S 12 | SSW 18 | SSE 10 | SSE 9 | NNE 7 | W 10 | SSE 8 | S 14 | SE 8 | SE 8 | SE 8 | NW 11 | SE 11 |
| kJ | 150 | 30 | 14 | 80 | 28 | 129 | 103 | 45 | 207 | 35 | 32 | 32 | 48 | 28 | 107 | 31 | 33 | 34 | 29 | 18 |
Wind waves Height (m) Direction Period (s) | ENE 7 | ENE 7 | ENE 7 | ENE 6 | ENE 6 | E 6 | ENE 6 | ENE 7 | — | NE 6 | — | — | — | ENE 7 | ENE 7 | ENE 6 | ENE 6 | ENE 7 | ENE 7 | ENE 7 |
| kJ | 349 | 233 | 163 | 144 | 112 | 78 | 93 | 105 | — | 34 | — | — | — | 99 | 105 | 141 | 218 | 255 | 230 | 223 |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 126 | 17 | 31 | 31 | 17 | 31 | 31 | 17 | 31 | 13 | 0 | 17 | 31 | 10 | 31 | 31 | 17 | 31 | 31 | 31 |
Best forecast wave conditions in Kaua'i | ||||||||||||||||||||
Best forecast wave conditions in United States | ||||||||||||||||||||
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Information about the Kalapaki Beach Surf forecast
The above surf forecast table for Kalapaki Beach provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Kalapaki Beach can be found by selecting the local surf guide option on the grey menu. Our Kalapaki 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 (Kalapaki 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 Kalapaki 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 Kaua'i? If you are looking for accommodation near Kalapaki Beach, camping, hotels and condos and appartments in Kaua'i, consider staying in Nawiliwili which is 1 km (1 miles) away. Alternatively, find information about places to stay and car hire in Lihue - Kauai which is 3 km (2 miles) away
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