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Marine Weather and Tide Forecast for Discovery Harbour, HI

April 29, 2025 11:41 PM HST (09:41 UTC)
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Sunrise 5:51 AM   Sunset 6:44 PM
Moonrise 7:29 AM   Moonset 9:24 PM 
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NOTE: Some of the data on this page has not been verified and should be used with that in mind. It may and occasionally will, be wrong. The tide reports are by xtide and are NOT FOR NAVIGATION.

Marine Forecasts
   
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NOTE: Zones were updated 3/20/2025
PHZ124 Big Island Southeast Waters- 842 Pm Hst Tue Apr 29 2025

Rest of tonight - East winds 10 to 15 knots. Seas to 4 feet. Wave detail: east southeast 4 feet at 8 seconds. Scattered showers.

Wednesday - East winds 10 to 15 knots. Seas 4 to 5 feet. Wave detail: east southeast 4 feet at 8 seconds. Scattered showers.

Wednesday night - East northeast winds to 15 knots. Seas 4 to 5 feet. Wave detail: east southeast 5 feet at 8 seconds. Isolated showers in the evening, then scattered showers after midnight.

Thursday - East northeast winds to 20 knots. Seas 5 to 7 feet. Wave detail: east 6 feet at 6 seconds and south southwest 3 feet at 16 seconds. Scattered showers.

Thursday night - East northeast winds 20 to 25 knots. Seas 6 to 8 feet. Wave detail: east 6 feet at 6 seconds and south southwest 3 feet at 15 seconds. Scattered showers.

Friday - East northeast winds 20 to 25 knots. Seas 6 to 8 feet. Wave detail: east 6 feet at 6 seconds and south 3 feet at 15 seconds. Scattered showers.

Friday night - East northeast winds 20 to 25 knots. Seas 5 to 7 feet. Wave detail: east 7 feet at 6 seconds and south 3 feet at 14 seconds. Scattered showers.

Saturday - East northeast winds 20 to 25 knots. Seas 5 to 7 feet. Wave detail: east 6 feet at 7 seconds. Scattered showers in the morning, then isolated showers in the afternoon. Scattered showers through the day.

Sunday - East northeast winds 20 to 25 knots. Seas 5 to 7 feet. Wave detail: east 6 feet at 7 seconds. Scattered showers in the morning, then isolated showers in the afternoon. Scattered showers through the day.
PHZ100 842 Pm Hst Tue Apr 29 2025

Synopsis for hawaiian coastal waters - A trough of low pressure near kauai will continue to weaken the high pressure ridge over the hawaiian islands, maintaining light and variable winds across the region. This boundary combined with a passing upper level disturbance will keep the potential for showers and Thunderstorms over the coastal waters through tonight. Trades will build back in from Wednesday onward.

7 Day Forecast for Marine Location Near Discovery Harbour, HI
   
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Tide / Current for Honuapo, Hawaii Island, Hawaii
  
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Honuapo
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Wed -- 01:19 AM HST     0.16 feet Low Tide
Wed -- 05:10 AM HST     0.87 feet High Tide
Wed -- 05:54 AM HST     Sunrise
Wed -- 08:29 AM HST     Moonrise
Wed -- 10:39 AM HST     -0.19 feet Low Tide
Wed -- 06:26 PM HST     2.68 feet High Tide
Wed -- 06:44 PM HST     Sunset
Wed -- 10:29 PM HST     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
        
  Sorry, Honuapo, Hawaii Island, Hawaii does not exist in database. Press Edit above and select a valid nearby location.

Honuapo, Hawaii Island, Hawaii, Tide feet
12
am
0.3
1
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0.2
2
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0.2
3
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0.5
4
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0.7
5
am
0.9
6
am
0.8
7
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0.6
8
am
0.4
9
am
0.1
10
am
-0.1
11
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-0.2
12
pm
-0
1
pm
0.3
2
pm
0.9
3
pm
1.4
4
pm
2
5
pm
2.4
6
pm
2.7
7
pm
2.6
8
pm
2.4
9
pm
2
10
pm
1.5
11
pm
1

Tide / Current for Napoopoo, Kealakekua Bay, Hawaii Island, Hawaii
  
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Napoopoo
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Wed -- 01:23 AM HST     0.06 feet Low Tide
Wed -- 05:20 AM HST     0.47 feet High Tide
Wed -- 05:55 AM HST     Sunrise
Wed -- 08:29 AM HST     Moonrise
Wed -- 10:43 AM HST     -0.29 feet Low Tide
Wed -- 06:36 PM HST     2.28 feet High Tide
Wed -- 06:46 PM HST     Sunset
Wed -- 10:32 PM HST     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
        
  Sorry, Napoopoo, Kealakekua Bay, Hawaii Island, Hawaii does not exist in database. Press Edit above and select a valid nearby location.

Napoopoo, Kealakekua Bay, Hawaii Island, Hawaii, Tide feet
12
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0.2
1
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0.1
2
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0.1
3
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0.2
4
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0.4
5
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0.5
6
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0.4
7
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0.3
8
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0.1
9
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-0.1
10
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-0.2
11
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-0.3
12
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-0.1
1
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0.2
2
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0.6
3
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1.1
4
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1.6
5
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2
6
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2.2
7
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2.3
8
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2.1
9
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1.8
10
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1.3
11
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0.9

Area Discussion for Honolulu, HI
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FXHW60 PHFO 300633 AFDHFO

Area Forecast Discussion National Weather Service Honolulu HI 833 PM HST Tue Apr 29 2025

SYNOPSIS

Light east southeast winds will allow for land breezes to develop tonight and hold into early morning Wednesday. A cold upper level low east of the state will keep a chance of locally heavy showers and a few thunderstorms through this evening, however land breezes should keep most shower activity over the coastal waters through early morning Wednesday. Light to gentle trade winds will gradually return Wednesday, providing a hybrid sea breeze trade wind pattern where leeward and interior areas may still see some clouds build up in the afternoon as well as clouds and showers focusing along windward and mauka areas. Typical breezy trade winds are expected Friday into early next week.

DISCUSSION

Light winds continue across the state this evening as a weak surface trough extends northward from Oahu and high pressure remains far northeast of the islands. Radar and satellite imagery show the numerous moderate to locally heavy showers that have developed over island interiors this afternoon as sea breezes matured are trending down and pushing offshore as land breezes begin to develop. A deep upper level low just east of the state will begin to shift eastward and open up into a trough overnight through Wednesday. The proximity of the low this evening will keep thunderstorms in the forecast but will taper off by Wednesday. Volcanic emissions and light background east southeast flow will keep vog in place over portions of the state through tonight.

Wednesday will serve as a transition day where gentle to moderate trades will gradually build back as the surface trough dissipates west of the state. This will allow drier air to slowly filter in from the east. The airmass will also gradually become more stable as the upper level low shifts eastward and weakens, allowing a mid level ridge to build over the state. Vog will also shift away from the smaller islands and blow mostly offshore by Wednesday night.

Moderate to locally breezy trades are expected to return Friday then hold through early next week as a pair of strong high pressure systems move north of the state. Expect showers to favor windward and mauka areas, particularly during the overnight and early morning hours.



AVIATION

A few heavy SHRA and isol TSRA is possible the rest of this evening. Trades return tomorrow with SHRA along windward and mauka locations. Brief periods of MVFR/IFR conds may occur with the more robust showers and storms, otherwise VFR should prevail.

AIRMET Sierra for mtn obsc is currently in effect for Maui, Lanai, and the Big Island. Conds are expected to improve later this evening.



MARINE
A trough of low pressure north of the island chain will linger through the night and continue to weaken the high pressure ridge over the state, keeping light and variable winds across the region. Trades with more stable weather conditions will build back in from tomorrow onward, strengthening to Small Craft Advisory levels for the typical windier coastal waters around Maui and the Big Island by Thursday.

A small northwest swell will continue to slowly fade, allowing surf along north and west facing shores to remain near or below average levels for this time of year. By Thursday, a moderate to long period north-northwest swell is expected to arrive, producing surf above the seasonal average. This north-northwest swell will slowly decline over the weekend.

Multiple small south swells will keep elevated south shore surf heights into the weekend. Trade winds should strengthen through Friday with rough and choppy surf rising along east facing shores by this weekend.



HFO WATCHES/WARNINGS/ADVISORIES
None.


Weather Reporting Stations
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Wind History for Hilo, Hilo Bay, Kuhio Bay, HI
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Airport Reports
   
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AirportDistAgeWind ktVisSkyWeatherAirDewPtRHinHg
PHKO53 sm48 minESE 0610 smClear73°F70°F89%30.04

Weather Map
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GEOS Local Image of Hawaii  
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South,Shore/Honolulu,HI





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