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Kosi Bay Surf Forecast
/ KZN North (23 surf breaks) /
Surf Forecasts:
Kosi Bay surfForecast / KZN North / South Africa
16 Day Weather and Surf, issued 1 pm Saturday 16 May 2026 SASTForecast update in hr min s Forecast update imminent
Kosi Bay surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Kosi Bay sea temperature is
25.6° C
(Which is 1.1°C warmer than normal for this time of year)Best Forecast Surf Conditions for Kosi Bay this week:
The surf forecast for Kosi Bay over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Monday (May 18) at 2AM. The primary swell is predicted to be 1.0m and 7s period with a secondary swell of 0.7m and 10s. The wind is predicted to be offshore as the swell arrives.
The most powerful waves expected at Kosi Bay in the next 16 days are 1.3m 13s and forecast to arrive on Sunday (May 17) at 8AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.1m 5s period and expected on Friday (May 22) at 5PM.
| Wave Type | Time (SAST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 2AM (Mon 18th May) | 3.5ft (1.0m) 7s |
| Best Surf | 2AM (Fri 22nd May) | 4.5ft (1.3m) 12s |
| Most Powerful | 8AM (Sun 17th May) | 4.5ft (1.3m) 13s |
Table - best surf conditions forecast for Kosi Bay over the next 16 days.
Updates in hr min s Forecast update imminent
Short Range ForecastLight rain (total 5mm), mostly falling on Sat night. Warm (max 23°C on Sat afternoon, min 20°C on Sun morning). Winds decreasing (fresh winds from the S on Sat afternoon, calm by Tue morning). | Days 5-7 Weather SummarySome drizzle, heaviest during Wed morning. Warm (max 23°C on Tue afternoon, min 19°C on Fri morning). Wind will be generally light. | ||||||||||||||||||||
Sat 16 | Sunday 17 | Monday 18 | Tuesday 19 | Wednesday 20 | Thursday 21 | Friday 22 | |||||||||||||||
PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | |
Swell Height Map |  |  |  |  |  |  |  |  | |||||||||||||
S 14 | S 13 | S 13 | S 12 | E 7 | S 13 | S 12 | S 13 | S 12 | S 12 | E 8 | E 8 | SSE 12 | SSE 12 | ESE 10 | ESE 9 | E 12 | E 8 | E 8 | E 11 | E 10 | |
602 | 427 | 335 | 290 | 103 | 352 | 190 | 264 | 134 | 93 | 127 | 131 | 162 | 111 | 250 | 169 | 449 | 143 | 113 | 274 | 177 | |
Wind (km/h) | |||||||||||||||||||||
cross-on | cross-on | on | cross-on | off | cross-off | cross | cross-off | cross-off | cross | cross-on | on | on | cross | on | cross-on | cross-off | cross-off | cross-off | cross-off | glassy | |
High Tide | 3:21PM2.11m | 3:41AM2.26m | 4:01PM2.15m | 4:21AM2.22m | 4:41PM2.13m | 5:02AM2.13m | 5:24PM2.06m | 5:44AM1.99m | 6:11PM1.94m | 6:30AM1.82m | 7:04PM1.80m | 7:24AM1.65m | 8:10PM1.66m | 8:34AM1.51m | |||||||
Low Tide | 9:26PM0.03m | 9:53AM0.03m | 10:07PM0.02m | 10:32AM0.05m | 10:49PM0.08m | 11:12AM0.12m | 11:33PM0.20m | 11:55AM0.24m | 00:21AM0.36m | 12:43PM0.38m | 1:16AM0.55m | 1:40PM0.53m | 2:26AM0.71m | ||||||||
 |  |  | |  | | | | | |  | | | | | | |  | | | | |
 | — | — | 6:20 | — | — | 6:20 | — | — | 6:22 | — | — | 6:22 | — | — | 6:22 | — | — | 6:24 | — | — | 6:24 |
 | 5:07 | — | — | 5:07 | — | — | 5:07 | — | — | 5:07 | — | — | 5:06 | — | — | 5:06 | — | — | 5:05 | — | 5:05 |
— | 2 | 2 | 1 | — | — | — | — | — | — | — | 1 | — | — | — | — | — | — | — | — | — | |
Temp °C | 23 | 22 | 22 | 22 | 22 | 22 | 23 | 22 | 23 | 23 | 22 | 22 | 23 | 22 | 22 | 22 | 22 | 22 | 23 | 23 | 22 |
18 | 19 | 22 | 22 | 22 | 22 | 22 | 21 | 23 | 22 | 22 | 22 | 23 | 21 | 22 | 22 | 22 | 19 | 19 | 20 | 23 | |
Swell 1 Height (m) Direction Period (s) | S 14 | S 13 | S 13 | S 12 | E 7 | S 13 | S 12 | E 7 | E 7 | E 7 | E 8 | E 8 | ESE 8 | ESE 7 | ESE 10 | ESE 9 | E 12 | E 8 | E 8 | E 11 | E 10 |
 kJ | 602 | 427 | 335 | 290 | 103 | 352 | 190 | 100 | 79 | 67 | 127 | 124 | 96 | 60 | 250 | 169 | 449 | 143 | 113 | 274 | 177 |
Swell 2 Height (m) Direction Period (s) | E 7 | E 7 | E 6 | E 7 | S 10 | E 7 | E 7 | S 13 | S 12 | S 12 | SSE 14 | SSE 13 | SSE 12 | E 9 | SSE 11 | E 12 | S 15 | E 11 | E 11 | S 11 | NE 5 |
| kJ | 32 | 43 | 68 | 74 | 94 | 66 | 53 | 264 | 134 | 93 | 105 | 131 | 162 | 74 | 70 | 103 | 109 | 112 | 85 | 63 | 28 |
Swell 3 Height (m) Direction Period (s) | — | — | S 6 | — | S 12 | — | S 15 | — | SSE 16 | SE 8 | S 11 | S 10 | ESE 11 | SSE 12 | E 13 | S 17 | S 8 | S 14 | S 13 | SSE 7 | S 11 |
| kJ | — | — | 26 | — | 76 | — | 112 | — | 49 | 35 | 57 | 30 | 40 | 111 | 51 | 90 | 19 | 58 | 51 | 5 | 58 |
Wind waves Height (m) Direction Period (s) | S 7 | S 6 | — | — | — | — | NE 3 | — | — | — | — | — | SSE 3 | — | — | — | — | N 4 | NNE 5 | N 4 | — |
| kJ | 353 | 109 | — | — | — | — | 3 | — | — | — | — | — | 1 | — | — | — | — | 12 | 54 | 15 | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 228 | 177 | 173 | 380 | 0 | 0 | 380 | 0 | 0 | 380 | 25 | 173 | 380 | 144 | 144 | 1101 | 0 | 290 | 258 | 144 | 0 |
Best forecast wave conditions in KwaZulu-Natal North Coast | |||||||||||||||||||||
Best forecast wave conditions in South Africa | |||||||||||||||||||||
Header Global | |||||||||||||||||||||
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FREE! Surf-Forecast.com widget for your website
The surf report / weather widget below is available to embed on third party websites free of charge and provides a summary of our Kosi Bay surf forecast. Simply grab the html code snippet that we provide and paste it into your own site. You can choose your preferred language and metric/imperial units for the surf forecast feed to suit users of your site. Click here to get the code.
Information about the Kosi Bay Surf forecast
The above surf forecast table for Kosi Bay provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Kosi Bay can be found by selecting the local surf guide option on the grey menu. Our Kosi Bay 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 (Kosi Bay) 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 Kosi Bay 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.
Kosi Bay is 108 km (67 miles) from the city of Maputo. If you plan a holiday in KwaZulu-Natal North Coast, look for hotels and other accommodation in Maputo. Maputo has rooms for a wide range of budgets as well as car hire and transport links.
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