Surf Forecasts:
Kalapaki Beach surf forecast from 21 Aug 2026:
- Best quality surf: Thursday 20 Aug, 11PM (local time) - 2.5ft (0.7m), 16s period, SSW swell with cross-offshore winds.
- Most powerful swell: Thursday 27 Aug, 2PM (local time) - 3.5ft (1.1m), 17s period, S swell with 686 kJ wave energy.
- Next surfable swell (1★+): Thursday 20 Aug, 11PM (local time) - 2.5ft (0.7m), 16s period with SSW 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 Thursday (Aug 20) at 11PM. The primary swell is predicted to be 0.7m and 16s period with a secondary swell of 1.2m 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 1.1m 17s and forecast to arrive on Thursday (Aug 27) 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 1.1m 7s period and expected on Friday (Aug 21) at 5AM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 11PM (Thu 20th Aug) | 2.5ft (0.7m) 16s |
| Best Surf | 11PM (Thu 20th Aug) | 2.5ft (0.7m) 16s |
| Most Powerful | 2PM (Thu 27th Aug) | 3.5ft (1.1m) 17s |
Table - best surf conditions forecast for Kalapaki Beach over the next 16 days.
The Lowdown
Alright, checkin’ the charts for the next couple of weeks, and it’s a rough patch for Kalapaki Beach. You’ll have to be patient and pick your battles. The first few days are small and bumpy, but there’s some bigger energy comin’ in the second week.
Right now, Thursday the 20th through the weekend, the surf is tiny and messy. Knee-high, maybe waist-high on the best ones, with a lot of cross-shore wind makin’ it choppy. Water temp is 80°, which is about average for this time of year.
Friday the 21st is a total washout – light onshore wind and no real waves.
Saturday the 22nd gets a little more size, but the wind is pumpin’ from the ENE at 12 to 15 mph, kickin’ up a chop. Swell is a weak 2ft from the SW with a short period, so it’s just a bumpy, gutless mess. Not worth it.
Sunday the 23rd sees a jump in size – 6ft from the east, but the period is a super short 7 seconds. That’s windswell, and with the wind still cross-shore at 15 mph, it’s gonna be a washing machine. The wave energy is strong, but it’s all messy. This looks more like a kite surfer’s day than a paddle surfer’s.
Monday the 24th stays similar – 5ft from the east, short period, bumpy. The morning might be barely rideable if you’re desperate, but I’d pass.
Tuesday the 25th through Thursday the 27th, we’ve got moderate swell (3ft to 6ft) but it’s all from the south or east, with the wind stickin’ to that ENE cross-shore or cross-on. The water is choppy, and the waves are poor quality. The energy is moderate to strong, but it’s just not comin’ together.
Now, lookin’ ahead to the end of the month and into September, there’s a pulse that might be worth a look. On Monday the 31st of August, we’ve got a solid 6ft to 7ft from the ENE with a period of 12 seconds – that’s a proper groundswell. The wave energy is huge. But here’s the catch: the wind is still cross-shore at 18 mph, lumpy and rough. The swell is big enough for experienced surfers only (over 8ft is expert territory, and this is close), but the chop will make it tough. *If* you’re an expert and don’t mind a battle, this could be the most powerful wave of the period.
The first few days of September keep the size around 5ft to 6ft, but the wind stays moderate from the north-east. The best chance for a clean window might be on Thursday the 4th of September, when the wind goes cross-offshore in the afternoon. That’s when Kalapaki could actually have some clean lines, with 6ft from the ENE at 9 seconds. It’s not perfect, but it’s the best look we’ve got.
Overall, the standout moment is that Monday the 31st of August for raw power, but only for the brave. The cleanest, most user-friendly waves look like Thursday the 4th of September afternoon. Crowds are often a factor here, so expect company.
Rusty.
Short Range ForecastMostly dry. Warm (max 27°C on Thu afternoon, min 25°C on Thu night). Wind will be generally light. | Days 5-7 Weather SummaryLight rain (total 2mm), mostly falling on Tue morning. Warm (max 27°C on Sun afternoon, min 24°C on Tue night). Wind will be generally light. | |||||||||||||||||||
Thu 20 | Friday 21 | Saturday 22 | Sunday 23 | Monday 24 | Tuesday 25 | Wednesday 26 | ||||||||||||||
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) | SSW 17 | SW 16 | SSW 17 | SW 16 | SSW 16 | SW 16 | SW 16 | E 7 | E 7 | ENE 7 | E 7 | SSW 14 | ENE 6 | ENE 6 | E 7 | E 7 | ENE 7 | SSW 14 | S 18 | S 19 |
Wave Graph | ||||||||||||||||||||
195 | 278 | 255 | 258 | 322 | 261 | 251 | 270 | 361 | 352 | 255 | 212 | 218 | 200 | 255 | 286 | 238 | 215 | 399 | 555 | |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross | on | on | cross | cross-on | cross | cross | cross | cross | cross | cross | cross | cross | cross-on | cross | cross | cross | cross | cross |
High Tide | 12:20PM0.56m | 11:30PM0.20m | 1:07PM0.59m | 00:35AM0.22m | 1:46PM0.62m | 1:16AM0.25m | 2:19PM0.63m | 1:51AM0.28m | 2:48PM0.64m | 2:25AM0.31m | 3:14PM0.64m | 3:02AM0.35m | ||||||||
Low Tide | 3:21AM0.10m | 9:24PM0.19m | 9:13PM0.18m | 5:45AM0.08m | 9:16PM0.18m | 6:37AM0.05m | 9:23PM0.17m | 7:21AM0.04m | 9:34PM0.16m | 8:01AM0.03m | 9:50PM0.13m | |||||||||
— | — | 6:16 | — | — | 6:16 | — | — | 6:16 | — | — | 6:16 | — | — | 6:18 | — | — | 6:18 | — | — | |
7:04 | — | — | 7:02 | — | — | 7:01 | — | — | 7:01 | — | — | 7:00 | — | — | 7:00 | — | — | 6:59 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 1 | 1 | — | — | — | — |
Temp °C | 27 | 26 | 27 | 27 | 26 | 26 | 27 | 25 | 26 | 27 | 25 | 26 | 26 | 25 | 26 | 26 | 25 | 25 | 26 | 25 |
Feels °C | 30 | 29 | 30 | 29 | 30 | 27 | 28 | 26 | 25 | 27 | 25 | 26 | 26 | 25 | 27 | 26 | 26 | 23 | 25 | 25 |
Swell 1 Height (m) Direction Period (s) | SSW 17 | ENE 7 | E 7 | SW 16 | SSW 16 | SW 16 | WNW 11 | SSW 16 | SSW 15 | SSW 15 | SSW 14 | SE 10 | SSW 13 | SE 8 | SE 8 | SSE 8 | SSW 15 | SSW 14 | S 18 | S 19 |
195 | 142 | 54 | 258 | 322 | 261 | 126 | 212 | 196 | 188 | 183 | 94 | 156 | 54 | 49 | 47 | 167 | 215 | 399 | 555 | |
Swell 2 Height (m) Direction Period (s) | W 10 | SW 16 | SSW 17 | NE 7 | W 10 | WNW 10 | SW 16 | WNW 12 | S 13 | SE 10 | SE 11 | SSW 14 | SE 10 | SSW 12 | SSW 16 | SSW 16 | SSE 8 | SSE 8 | SSW 13 | SSW 13 |
50 | 278 | 255 | 47 | 51 | 85 | 251 | 123 | 130 | 60 | 73 | 163 | 74 | 121 | 201 | 140 | 48 | 45 | 133 | 135 | |
Swell 3 Height (m) Direction Period (s) | E 8 | WSW 9 | NE 7 | E 7 | SSE 14 | S 15 | SSE 8 | S 14 | WNW 12 | WNW 12 | S 13 | S 13 | SSE 12 | SSW 16 | SSW 12 | SSW 12 | SSW 12 | S 18 | SE 8 | W 10 |
31 | 26 | 49 | 52 | 62 | 109 | 26 | 107 | 77 | 54 | 89 | 81 | 46 | 153 | 83 | 85 | 79 | 167 | 34 | 8 | |
Wind waves Height (m) Direction Period (s) | NE 7 | — | — | — | ENE 7 | ENE 7 | ENE 6 | E 7 | E 7 | ENE 7 | E 7 | ENE 6 | ENE 6 | ENE 6 | E 7 | E 7 | ENE 7 | ENE 6 | ENE 6 | E 6 |
79 | — | — | — | 99 | 117 | 177 | 270 | 361 | 352 | 255 | 212 | 218 | 200 | 255 | 286 | 238 | 200 | 144 | 182 | |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 13 | 10 | 45 | 31 | 17 | 31 | 31 | 31 | 33 | 33 | 31 | 31 | 33 | 17 | 31 | 17 | 17 | 31 | 17 | 17 |
Best forecast wave conditions in Kaua'i | ||||||||||||||||||||
Best forecast wave conditions in United States | ||||||||||||||||||||
Header Global | ||||||||||||||||||||
- Map Icons:
Break
Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)
Wind Speed (km/h)
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











