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Surf Forecasts:

Keawaiki Bay surfForecast / HAW – Big Island / USA

information circle16 Day Weather and Surf, issued 1 am Wednesday 18 Mar 2026 HST
Forecast update in hr  min  s Forecast update imminent
Keawaiki Bay surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Keawaiki Bay sea temperature is
25.1° C
 (Which is slightly warmer than usual)

Best Forecast Surf Conditions for Keawaiki Bay this week:

The surf forecast for Keawaiki Bay over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Wednesday (Mar 18) at 8AM. The primary swell is predicted to be 0.8m and 13s period with a secondary swell of 0.5m and 9s. The wind is predicted to be glassy as the swell arrives.

The most powerful waves expected at Keawaiki Bay in the next 16 days are 0.9m 13s and forecast to arrive on Wednesday (Mar 18) at 11AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.9m 8s period and expected on Tuesday (Mar 24) at 2PM.

Wave TypeTime (HST) & Date Wave Height & Period
Next good surf (1 star+) 8AM (Wed 18th Mar)2.5ft (0.8m) 13s
Best Surf 8AM (Wed 18th Mar)2.5ft (0.8m) 13s
Most Powerful11AM (Wed 18th Mar)3ft (0.9m) 13s

Table - best surf conditions forecast for Keawaiki Bay over the next 16 days.

Updates in  hr  min  s Forecast update imminent 
16 DaysHourly
Print Table

Short Range Forecast Moderate rain (total 13mm), heaviest on Fri afternoon. Warm (max 26°C on Thu morning, min 24°C on Wed night). Wind will be generally light.

Days 3-6 Weather Summary Moderate rain (total 17mm), heaviest on Sat night. Warm (max 26°C on Sat afternoon, min 22°C on Sat night). Wind will be generally light.

Wednesday
18
Thursday
19
Friday
20
Saturday
21
Sunday
22
Monday
23
Tuesday
24
AMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNight
Rating
(10 max)
1
2
1
0
0
1
0
0
0
0
0
1
0
0
1
0
0
1
0
0
0
Swell
Height Map
See all maps
Wave Height (m) & direction (?)
0.9
N
0.9
N
0.8
N
0.8
N
0.8
N
0.8
N
0.8
N
0.7
N
0.3
SW
0.5
W
0.5
WNW
0.5
WNW
0.5
WNW
0.4
NW
0.4
WNW
0.4
NW
0.6
N
0.8
N
0.2
WNW
0.2
WNW
0.1
NW
Period(s) (?)13121211111110101912121211141413109121211
Wave
Graph
(?)Metric surfscale
Energy kJ (?)27625118416315514613110057728178706278446910614135
Wind
(km/h)
10
WSW
5
W
0
W
10
WNW
5
W
5
SSE
10
SW
15
SW
15
SSW
20
SW
15
SW
10
S
10
WNW
10
NW
10
NE
15
NNE
15
NNE
15
NE
15
NNE
20
NE
10
ENE
Wind State (?)
onshore
cross-onshore
cross-shore
cross-offshore
offshore
glassy
cross-
on		glassglassoncross-
on		cross-
off		cross-
on		cross-
on		crosscross-
on		crosscross-
off		ononcross-
off		crosscross-
off		cross-
off		crosscross-
off		cross-
off
High Tide
/ height (m)
3:53PM
0.65
3:51AM
0.67
4:31PM
0.71
4:21AM
0.60
5:12PM
0.75
4:52AM
0.52
5:57PM
0.77
5:23AM
0.44
6:49PM
0.76
5:54AM
0.37
7:52PM
0.74
6:29AM
0.30
9:12PM
0.71
Low Tide
/ height (m)
9:44AM
0.06
9:50PM
0.12
10:06AM
0.04
10:39PM
0.15
10:31AM
0.03
11:31PM
0.18
10:58AM
0.03
12:31AM
0.23
11:27AM
0.04
1:47AM
0.27
12:02PM
0.07
3:46AM
0.28
12:45PM
0.11
Wednesday
18
Thursday
19
Friday
20
Saturday
21
Sunday
22
Monday
23
Tuesday
24
Sunrise6:28--6:28--6:26--6:26--6:26--6:24--6:24--
Sunset-6:34--6:34--6:34--6:34--6:35--6:35--6:35-
light rain
thunderstorm
part cloud
part cloud
part cloud
thunderstorm
cloud
thunderstorm
thunderstorm
light rain
light rain
mod rain
cloud
cloud
thunderstorm
light rain
thunderstorm
light rain
part cloud
clear
clear
Rain (mm)
22---2-34127--2221---
Temp. °C252524262625262625252624252524242423242323
Feels °C (?)282727282828282727252624272626252524242224
  • 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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The surf report / weather widget below is available to embed on third party websites free of charge and provides a summary of our Keawaiki Bay 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 Keawaiki Bay at:
surf-forecast.com

Information about the Keawaiki Bay Surf forecast

The above surf forecast table for Keawaiki Bay provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Keawaiki Bay can be found by selecting the local surf guide option on the grey menu. Our Keawaiki 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 (Keawaiki 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 Keawaiki 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.

Keawaiki Bay is 88 km (55 miles) from Hilo. If you plan a vacation in Big Island, look for hotels and other accommodation in Hilo. Hilo has rooms for a wide range of budgets as well as car hire and transport links.

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