Larsen Street surfForecast / West Coast South Island / New Zealand

information circle16 Day Weather and Surf, issued 12 pm Saturday 14 Mar 2026 NZDT
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
17.3° C
(Which is 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 (Mar 17) at 1AM. The primary swell is predicted to be 1.7m and 16s period. 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 2.3m 18s and forecast to arrive on Monday (Mar 16) at 4AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.2m 13s period and expected on Monday (Mar 16) at 4AM.

Wave TypeTime (NZDT) & Date Wave Height & Period
Next good surf (1 star+) 1AM (Tue 17th Mar)5.5ft (1.7m) 16s
Best Surf 1AM (Tue 17th Mar)5.5ft (1.7m) 16s
Most Powerful 4AM (Mon 16th Mar)7.5ft (2.3m) 18s

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 16°C on Sat morning, min 14°C on Sun night). Winds decreasing (fresh winds from the SW on Sat morning, light winds from the SE by Mon night).

Days 3-6 Weather Summary Light rain (total 3mm), mostly falling on Wed night. Very mild (max 17°C on Wed night, min 15°C on Tue morning). Wind will be generally light.

Saturday
14
Sunday
15
Monday
16
Tuesday
17
Wednesday
18
Thursday
19
Friday
20
AMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNight
Rating
(10 max)
0
0
2
2
1
3
3
1
4
3
0
2
2
0
2
2
1
1
2
1
2
Swell
Height Map
Wave Height (m) & direction (?)
1.6
WSW
2.2
WSW
2.3
W
2.2
WSW
2.4
WSW
2.2
WSW
2.2
WSW
2
WSW
1.7
WSW
1.4
WSW
1.1
WSW
1.2
WSW
1
WSW
0.9
WSW
1.2
WSW
1.2
W
1.1
WSW
1.1
WSW
1.1
WSW
1.2
WSW
1.2
WSW
Period(s) (?)7910101214171616141112121110101011111113
Wave
Graph
(?)Metric surfscale
Energy kJ (?)22572798591416051781284221101341746280380260183300282232270256302440
Wind
(km/h)
35
SSW
35
SW
20
SSW
25
SSW
30
SW
15
S
20
SSW
25
SW
10
SSE
0
SE
15
SW
5
ESE
10
ENE
10
NW
5
SE
5
E
10
W
15
SSW
5
S
15
WSW
10
SE
Wind State (?)
onshore
cross-onshore
cross-shore
cross-offshore
offshore
glassy
cross-
off
crosscross-
off
cross-
off
crosscross-
off
cross-
off
crosscross-
off
glasscrosscross-
off
cross-
off
onglasscross-
off
cross-
on
cross-
off
glasscrossoff
High Tide
/ height (m)
8:37PM
2.18
9:00AM
2.32
9:28PM
2.36
9:46AM
2.52
10:11PM
2.55
10:26AM
2.73
10:50PM
2.73
11:05AM
2.91
11:27PM
2.88
11:43AM
3.05
12:05AM
2.99
12:22PM
3.12
12:44AM
3.04
Low Tide
/ height (m)
2:20PM
0.89
2:44AM
0.84
3:15PM
0.69
3:34AM
0.65
4:00PM
0.48
4:16AM
0.45
4:40PM
0.26
4:55AM
0.26
5:18PM
0.09
5:33AM
0.11
5:56PM
-0.04
6:12AM
0.01
6:35PM
-0.09
Saturday
14
Sunday
15
Monday
16
Tuesday
17
Wednesday
18
Thursday
19
Friday
20
Sunrise7:28--7:28--7:30--7:31--7:33--7:33--7:35--
Sunset-7:57--7:54--7:53--7:52--7:50--7:49--7:46-
part cloud
part cloud
part cloud
part cloud
clear
part cloud
part cloud
part cloud
part cloud
clear
clear
clear
part cloud
cloud
light rain
light rain
part cloud
part cloud
part cloud
part cloud
clear
Rain (mm)
--------------21-----
Temp. °C161615161615161616151616161617171716171917
Feels °C (?)81011111111121213151416151618171614162015
  • 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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