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Surf Forecasts:

Grandma's surf break

Grandma's surfForecast / HAW – Maui / USA

information circle48hr Weather and Surf, issued 1 pm Tuesday 13 Jan 2026 HST
Forecast update in hr  min  s Forecast update imminent
Grandma's surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Grandma's sea temperature is
25.6° C
 (Which is 1.1°C warmer than normal for this time of year)

How big are the waves at Grandma's today?

The current surf forecast for Grandma's at 8PM is: 1.4m 13s primary swell from a Northwest direction and 0.2m 10s secondary swell from a South-southeast direction (forecast issued at 01:00pm January 13). An open ocean swell of 0.6m 4s is not directed at the surf break. The wind direction is predicted to be offshore and the swell rating is 2.

Time (HST) & DateWave HeightWave Period
Morning (13 Jan)5ft (1.6m)14s
Afternoon (13 Jan)5ft (1.5m)14s
Evening (13 Jan)4.5ft (1.4m)13s

Table - waves today at Grandma's. (Swell directed towards the surf break)

Updates in  hr  min  s Forecast update imminent 
12 DaysHourly
Print Table
Tuesday
13
Wednesday
14
Thursday
15
Friday
16
11 AM2 PM5 PM8 PM11 PM2 AM5 AM8 AM11 AM2 PM5 PM8 PM11 PM2 AM5 AM8 AM11 AM2 PM5 PM8 PM11 PM2 AM5 AM8 AM
Rating
(10 max)
3
3
3
2
2
2
2
2
0
0
0
0
0
0
0
1
1
0
1
3
3
3
2
2
Swell
Height Map
See all maps
Wave Height (m) & direction (?)
1.6
NW
1.6
NW
1.5
NW
1.4
NW
1.3
NW
1.1
NW
1.1
NW
1.1
NW
1
NW
0.9
NW
0.8
NW
0.8
NW
0.6
NW
0.6
NW
0.6
NW
0.9
NW
0.9
NW
1
NW
1.4
NW
1.7
NW
1.8
NW
1.8
NW
1.6
NW
1.6
NW
Period(s) (?)141414131313131313131313121212121212161615151515
Wave
Graph
(?)Metric surfscale
Energy kJ (?)975934816642560437380374326238196193124118122209209292102714201417141711241045
Wind
(km/h)
10
NNE
5
NE
10
NNE
10
NNE
0
SSW
5
W
5
E
0
ENE
20
SSW
30
SSW
30
SSW
30
SSW
25
SW
25
SSW
20
SW
10
NW
20
N
25
N
30
NNE
30
NNE
35
NNE
30
NNE
30
NNE
30
NE
Wind State (?)
onshore
cross-onshore
cross-shore
cross-offshore
offshore
glassy
offoffoffoffglassglassglassglasscross-
on		cross-
on		cross-
on		ononononcrosscross-
off		cross-
off		cross-
off		offoffoffoffoff
High Tide
/ height (m)
12:14PM
0.26
1:40AM
0.70
1:15PM
0.25
2:21AM
0.74
2:07PM
0.25
2:59AM
0.77
Low Tide
/ height (m)
8:21AM
0.19
5:45PM
-0.01
9:03AM
0.15
6:32PM
-0.02
9:38AM
0.12
7:17PM
-0.03
Tuesday
13
Wednesday
14
Thursday
15
Friday
16
Sunrise-------7:05-------7:05-------7:05
Sunset--6:04-------6:05-------6:05-----
clear
clear
clear
clear
clear
clear
clear
part cloud
clear
part cloud
part cloud
part cloud
clear
part cloud
rain showers
mod rain
light rain
part cloud
cloud
clear
clear
clear
clear
clear
Rain (mm)
--------------291-------
Temp. °C242524232323222324252525242423212223222120202020
Feels °C (?)242624242525242524222222212222222019181615151515
  • Map Icons:
  • Break
  • Live Wave Height (m)
  • Live Wind Speed (km/h)
  • Surf Rating (10 Max)
  • Ocean Swells (m)
  • Wind Speed (km/h)
Map placeholder

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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 Grandma's 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.

View detailed surf forecast for Grandma's at:
surf-forecast.com

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