Larsen Street surfForecast / West Coast South Island / New Zealand

information circle16 Day Weather and Surf, issued 5 am Tuesday 21 Apr 2026 NZST
Forecast update in hr  min  s Forecast update imminent
Larsen Street surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Larsen Street sea temperature is
17.0° C
(Which is 1.2°C warmer than normal for this time of year)

Best Forecast Surf Conditions for Larsen Street this week:

The surf forecast for Larsen Street over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Tuesday (Apr 21) at 9AM. The primary swell is predicted to be 0.6m and 12s period. The wind is predicted to be offshore as the swell arrives.

The most powerful waves expected at Larsen Street in the next 16 days are 2.0m 13s and forecast to arrive on Monday (Apr 27) at 12PM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.6m 3s period and expected on Tuesday (Apr 21) at 9AM.

Wave TypeTime (NZST) & Date Wave Height & Period
Next good surf (1 star+) 9AM (Tue 21st Apr)2ft (0.6m) 12s
Best Surf 6AM (Sat 25th Apr)3.5ft (1.0m) 16s
Most Powerful12PM (Mon 27th Apr)6.5ft (2.0m) 13s

Table - best surf conditions forecast for Larsen Street over the next 16 days.


Updates in  hr  min  s Forecast update imminent

Short Range Forecast Mostly dry. Very mild (max 15°C on Wed afternoon, min 8°C on Tue night). Wind will be generally light.

Days 3-6 Weather Summary Heavy rain (total 21mm), heaviest during Sun afternoon. Very mild (max 17°C on Sun afternoon, min 11°C on Fri morning). Winds increasing (calm on Fri night, fresh winds from the WSW by Sun night).

Tuesday
21
Wednesday
22
Thursday
23
Friday
24
Saturday
25
Sunday
26
Monday
27
AMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNight
Rating
(10 max)
1
1
1
1
0
1
1
1
2
2
0
2
3
0
2
2
0
1
2
1
2
Swell
Height Map
Wave Height (m) & direction (?)
0.6
WSW
0.5
WSW
0.4
WSW
0.5
WSW
0.6
WSW
0.6
WSW
0.4
WSW
0.5
W
0.7
WSW
0.8
WSW
0.8
WSW
0.6
W
1.3
WSW
1.3
WSW
1.1
W
1.5
WSW
1.3
WSW
1.6
WSW
1.9
WSW
2.1
WSW
1
WSW
Period(s) (?)121116141312181615141318161514131014131213
Wave
Graph
(?)Metric surfscale
Energy kJ (?)1046884120139117103137237269229235893764487692289106012691261356
Wind
(km/h)
20
SE
15
SE
15
ESE
15
SE
10
WSW
15
E
5
ESE
10
SW
5
SE
5
ESE
25
SW
10
SSE
5
S
30
SW
15
SSW
10
WSW
25
SW
20
SW
20
SSW
20
SW
15
SSW
Wind State (?)
onshore
cross-onshore
cross-shore
cross-offshore
offshore
glassy
offoffoffoffcross-
on
cross-
off
offcrossoffoffcrosscross-
off
glasscrosscross-
off
cross-
on
crosscrosscross-
off
crosscross-
off
High Tide
/ height (m)
1:20PM
2.86
1:44AM
2.83
2:17PM
2.66
2:44AM
2.66
3:22PM
2.48
3:53AM
2.53
4:37PM
2.36
5:09AM
2.46
5:54PM
2.34
6:22AM
2.47
7:01PM
2.40
7:24AM
2.54
7:56PM
2.49
Low Tide
/ height (m)
7:33PM
0.26
8:04AM
0.27
8:30PM
0.44
9:07AM
0.43
9:35PM
0.60
10:18AM
0.56
10:47PM
0.68
11:32AM
0.60
12:00AM
0.68
12:41PM
0.56
1:05AM
0.61
1:39PM
0.48
2:00AM
0.52
Tuesday
21
Wednesday
22
Thursday
23
Friday
24
Saturday
25
Sunday
26
Monday
27
Sunrise7:09--7:11--7:13--7:13--7:15--7:16--7:16--
Sunset-5:53--5:52--5:51--5:49--5:47--5:46--5:45-
part cloud
part cloud
clear
clear
clear
part cloud
part cloud
part cloud
part cloud
clear
clear
part cloud
part cloud
part cloud
part cloud
light rain
rain showers
rain showers
rain showers
part cloud
part cloud
Rain (mm)
---------------38101--
Temp. °C11149131512111211121212141415161716151514
Feels °C (?)69491179989799912131312121111
  • 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 Larsen Street Surf forecast

The above surf forecast table for Larsen Street provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Larsen Street can be found by selecting the local surf guide option on the grey menu. Our Larsen Street 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 (Larsen Street) 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 Larsen Street 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 West Coast South Island? If you are looking for accommodation near Larsen Street, camping, hotels and holiday cottages in West Coast South Island, consider staying in Nelson which is 157 km (98 miles) away.

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