A plume of moisture moving in from the southeast is causing and increase in showers over the eastern half of the state. This moisture will continue to spread westward today. Due to the abundant moisture, brief periods of heavy rain will be possible. Our more typical trade wind pattern will return on Wednesday through the weekend.
A surface trough near the islands will continue to enhance shower activity across the state. MVFR and even brief IFR conditions possible within heavier showers. Rain chances are expected to relent by the evening hours. Moderate to breezy trade winds strengthen Wednesday.
Airmet SIERRA for mountain obscuration is in effect for windward Kauai, Oahu, Maui, Molokai, Lanai, and the Big Island. These conditions are expected to last much of the day today as a result of ongoing shower activity.
AIRMET Tango remains in effect for moderate turbulence below 12,000 feet all areas of the state.
Fresh to strong easterly trades have returned as a subtropical ridge strengthens north of the islands, resulting in Small Craft Advisory conditions across the typically windier channels and waters around Maui and the Big Island. Additional marine zones, particularly the Maui County Windward Waters and the Kaiwi Channel, may need to be added to the advisory in subsequent packages as the area of strong winds expands. Guidance suggests this pattern will persist through the weekend.
Surf along exposed south-facing shores is trending upward this morning as a fresh long-period south-southwest swell fills in. Nearshore PacIOOS buoys reflect this trend, with peak spectral energy centered near the 18-second band. Offshore observations from NDBC buoy 51002 also indicate increasing energy within these long-period bands, supporting a continued building trend through the day today. Surf heights may approach High Surf Warning criteria of 15-foot faces by late Wednesday as the swell peaks. Thereafter, a gradual downward trend is expected through the latter half of the week.
Surf along north-facing shores will begin to build later today and continue increasing through the second half of the week as a couple of out-of-season northerly swells arrive from broad low pressure centered far north of the state near the Aleutian Islands. Surf heights will likely rise above the seasonal average by Wednesday, then remain elevated through Thursday and Friday before gradually easing over the weekend.
Surf along east-facing shores will gradually build through the week as strengthening trade winds generate increasing short- period wind waves. Surf should return to near seasonal levels by the end of the week.
Issued at 302 AM HST Tue Jun 2 2026
Fresh to strong easterly trades have returned as a subtropical ridge strengthens north of the islands, resulting in Small Craft Advisory conditions across the typically windier channels and waters around Maui and the Big Island. Additional marine zones, particularly the Maui County Windward Waters and the Kaiwi Channel, may need to be added to the advisory in subsequent packages as the area of strong winds expands. Guidance suggests this pattern will persist through the weekend.
Surf along exposed south-facing shores is trending upward this morning as a fresh long-period south-southwest swell fills in. Nearshore PacIOOS buoys reflect this trend, with peak spectral energy centered near the 18-second band. Offshore observations from NDBC buoy 51002 also indicate increasing energy within these long-period bands, supporting a continued building trend through the day today. Surf heights may approach High Surf Warning criteria of 15-foot faces by late Wednesday as the swell peaks. Thereafter, a gradual downward trend is expected through the latter half of the week.
Surf along north-facing shores will begin to build later today and continue increasing through the second half of the week as a couple of out-of-season northerly swells arrive from broad low pressure centered far north of the state near the Aleutian Islands. Surf heights will likely rise above the seasonal average by Wednesday, then remain elevated through Thursday and Friday before gradually easing over the weekend.
Surf along east-facing shores will gradually build through the week as strengthening trade winds generate increasing short- period wind waves. Surf should return to near seasonal levels by the end of the week.
High Surf Advisory until 6 AM HST Thursday for Big Island South- Big Island Southeast-East Honolulu-Ewa Plain-Honolulu Metro- Kahoolawe-Kauai South-Kauai Southwest-Kona-Lanai Leeward-Lanai South-Maui Central Valley South-Maui Leeward West-Molokai Leeward South-Niihau-South Haleakala-South Maui/Upcountry- Waianae Coast.
Small Craft Advisory until 6 AM HST Thursday for Alenuihaha Channel-Big Island Leeward Waters-Big Island Southeast Waters- Maalaea Bay-Pailolo Channel.
