Larsen Street surfForecast / West Coast South Island / New Zealand

information circle16 Day Weather and Surf, issued 11 pm Saturday 18 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
17.1° 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 Sunday (Apr 19) at 9PM. The primary swell is predicted to be 3.0m and 14s period with a secondary swell of 1.3m and 8s. The wind is predicted to be cross-offshore as the swell arrives.

The most powerful waves expected at Larsen Street in the next 16 days are 3.0m 15s and forecast to arrive on Sunday (Apr 19) at 9AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.4m 9s period and expected on Sunday (Apr 19) at 9AM.

Wave TypeTime (NZST) & Date Wave Height & Period
Next good surf (1 star+) 9PM (Sun 19th Apr)10ft (3.0m) 14s
Best Surf 9PM (Sun 19th Apr)10ft (3.0m) 14s
Most Powerful 9AM (Sun 19th Apr)10ft (3.0m) 15s

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


Updates in  hr  min  s Forecast update imminent

Short Range Forecast Moderate rain (total 14mm), heaviest on Sat night. Very mild (max 16°C on Mon morning, min 11°C on Sun night). Winds increasing (light winds from the NE on Sat night, fresh winds from the S by Tue afternoon).

Days 3-6 Weather Summary Mostly dry. Very mild (max 14°C on Wed morning, min 9°C on Wed night). Wind will be generally light.

Sunday
19
Monday
20
Tuesday
21
Wednesday
22
Thursday
23
Friday
24
Sat
25
NightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPM
Rating
(10 max)
2
3
2
4
3
2
1
0
0
1
1
1
1
1
0
2
1
1
2
3
2
Swell
Height Map
Wave Height (m) & direction (?)
2.5
W
3
W
3
W
3
W
1.4
WSW
1.3
W
1.1
W
0.6
W
0.5
W
0.4
WSW
0.4
WSW
0.5
WSW
0.4
WSW
0.4
WSW
0.5
W
0.7
WSW
0.7
WSW
0.7
WSW
0.8
WSW
1.3
WSW
1.3
WSW
Period(s) (?)131514141313111111161413121816151413181615
Wave
Graph
(?)Metric surfscale
Energy kJ (?)23093915372733886235343039361838210250103137243210184422893775
Wind
(km/h)
15
NE
20
ENE
15
NE
10
ESE
10
SSE
25
SSE
20
S
15
S
25
S
15
S
10
S
15
SE
15
ESE
10
ESE
5
WNW
10
E
10
E
5
WSW
10
ESE
5
ESE
10
WSW
Wind State (?)
onshore
cross-onshore
cross-shore
cross-offshore
offshore
glassy
crosscross-
off
crossoffoffoffcross-
off
cross-
off
cross-
off
cross-
off
cross-
off
offoffcross-
off
cross-
on
cross-
off
cross-
off
cross-
on
cross-
off
glasscross-
on
High Tide
/ height (m)
11:20PM
3.09
11:42AM
3.11
12:04AM
3.07
12:29PM
3.02
12:52AM
2.98
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
Low Tide
/ height (m)
5:31AM
-0.06
5:54PM
-0.03
6:18AM
-0.01
6:42PM
0.09
7:09AM
0.10
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
Sunday
19
Monday
20
Tuesday
21
Wednesday
22
Thursday
23
Friday
24
Sat
25
Sunrise-7:07--7:09--7:09--7:11--7:13--7:13--7:15-
Sunset--5:57--5:54--5:53--5:52--5:51--5:49--5:47
rain showers
thunderstorm
cloud
part cloud
part cloud
part cloud
cloud
cloud
cloud
cloud
cloud
part cloud
part cloud
part cloud
clear
clear
clear
clear
clear
clear
clear
Rain (mm)
113-------------------
Temp. °C141515141615121312121414101214121313131213
Feels °C (?)111112121197657109581191111111011
  • Map Icons:
  • Break
  • 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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