Moonlight Bay surfForecast / Overberg / South Africa

information circle12 Day Weather and Surf, issued 1 pm Wednesday 17 Dec 2025 SAST
Forecast update in hr  min  s Forecast update imminent
Moonlight Bay surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Moonlight Bay sea temperature is
18.4° C
(Which is slightly cooler than normal)


Best Forecast Surf Conditions for Moonlight Bay this week:

The surf forecast for Moonlight Bay over the next 12 days: The first swell (rated 1 star or higher) is forecast to arrive on Thursday (Dec 18) at 2AM. The primary swell is predicted to be 1.1m and 12s period with a secondary swell of 1.5m and 8s. Another secondary swell of 0.6m and 12s is also forecast. The wind is predicted to be offshore as the swell arrives.

The most powerful waves expected at Moonlight Bay in the next 12 days are 1.8m 15s and forecast to arrive on Saturday (Dec 20) at 2PM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 2.1m 6s period and expected on Saturday (Dec 20) at 5PM.

Wave TypeTime (SAST) & Date Wave Height & Period
Next good surf (1 star+) 2AM (Thu 18th Dec)3.5ft (1.1m) 12s
Best Surf 2AM (Thu 18th Dec)3.5ft (1.1m) 12s
Most Powerful 2PM (Sat 20th Dec)6ft (1.8m) 15s

Table - best surf conditions forecast for Moonlight Bay over the next 12 days.

Updates in  hr  min  s Forecast update imminent

Short Range Forecast Mostly dry. Warm (max 24°C on Sat morning, min 16°C on Wed night). Winds increasing (light winds from the ESE on Wed night, fresh winds from the SSE by Fri afternoon).

Days 3-6 Weather Summary Light rain (total 2mm), mostly falling on Mon night. Warm (max 27°C on Sun afternoon, min 19°C on Sat night). Winds decreasing (near gales from the SE on Sat afternoon, calm by Mon night).

Wed
17
Thursday
18
Friday
19
Saturday
20
Sunday
21
Monday
22
Tuesday
23
PMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAM
Rating
(10 max)
3
3
0
0
2
0
0
1
1
0
1
2
1
1
1
0
0
0
0
1
0
Swell
Height Map
Wave Height (m) & direction (?)
1.8
WSW
1.1
WSW
1
SSE
0.9
SW
1.3
SSE
1.2
SSE
0.6
SSW
1.4
SSW
1.7
SSW
1.8
SSW
1.5
SSW
1.1
SSW
2.1
SE
1.1
SE
0.9
SSE
0.6
SW
0.8
SSE
0.7
SSE
1.4
S
1.6
SSE
1.9
S
Period(s) (?)131298111113121415131277811911789
Wave
Graph
(?)Metric surfscale
Energy kJ (?)993386177118459334113589124014137223304661148188108123183314549
Wind
(km/h)
25
S
15
ESE
25
SSE
35
SSE
30
SE
30
SSE
40
SSE
35
ESE
35
SE
50
SE
45
ESE
30
ESE
45
SE
25
ESE
10
S
10
SW
20
SSW
20
S
30
SSE
30
SE
35
SE
Wind State (?)
onshore
cross-onshore
cross-shore
cross-offshore
offshore
glassy
cross-
off
offcross-
off
cross-
off
offcross-
off
cross-
off
offoffcross-
off
offoffoffoffcross-
off
crosscrosscross-
off
cross-
off
offcross-
off
High Tide
/ height (m)
2:15AM
1.28
2:18PM
1.37
2:50AM
1.33
2:53PM
1.39
3:23AM
1.37
3:27PM
1.41
3:57AM
1.39
4:01PM
1.41
4:31AM
1.40
4:34PM
1.39
5:06AM
1.40
5:09PM
1.35
5:42AM
1.40
Low Tide
/ height (m)
8:07PM
0.27
8:17AM
0.38
8:41PM
0.23
8:52AM
0.34
9:14PM
0.20
9:26AM
0.32
9:46PM
0.18
10:00AM
0.31
10:17PM
0.18
10:34AM
0.32
10:49PM
0.19
11:10AM
0.33
11:22PM
0.22
11:48AM
0.36
Wed
17
Thursday
18
Friday
19
Saturday
20
Sunday
21
Monday
22
Tuesday
23
Sunrise--5:26--5:28--5:28--5:28--5:28--5:28--5:30
Sunset7:52--7:53--7:54--7:54--7:55--7:55--7:57--
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
part cloud
rain showers
rain showers
rain showers
clear
clear
Rain (mm)
----------------111--
Temp. °C181719201721211924232226272424232220191921
Feels °C (?)131314141116151317151622201925252517151414
  • Map Icons:
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  • Live Wave Height (m)
  • Live Wind Speed (km/h)
  • Surf Rating (10 Max)
  • Ocean Swells (m)
  • Wind Speed (km/h)
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Information about the Moonlight Bay Surf forecast

The above surf forecast table for Moonlight Bay provides essential information for determining whether the surfing conditions will be good over the next 12 days. A general guide to surfing at Moonlight Bay can be found by selecting the local surf guide option on the grey menu. Our Moonlight 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 (Moonlight 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 Moonlight 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.

Are you planning a holiday in Overberg? If you are looking for accommodation near Moonlight Bay, camping, hotels and holiday cottages in Overberg, consider staying in Grabouw which is 25 km (16 miles) away. Other places in and around Overberg where you can find information about places to rent, and car hire include Hermanus which is 40 km (25 miles) away, Stellenbosch, Kayamnandi and Bellville.

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