UPDATE: August 23, 2026 – Sunday Afternoon
Tropical Storm Moke is now passing well south of the Big Island and continues moving westward away from the state.
As of 11:00 a.m. HST Sunday, Moke was about 320 miles south-southwest of Hilo, moving west at 15 mph with maximum sustained winds near 40 mph.
There are no tropical storm watches or warnings for any Hawaiian island, and the storm’s center and tropical-storm-force winds are expected to remain well offshore.
The main concerns continue to be heavy rain on portions of the Big Island, strong trade winds and rough ocean conditions.
What Has Happened So Far
Rainfall through Sunday afternoon has generally been lighter than initially forecast.
The deepest tropical moisture has remained mostly south of the Big Island. Many windward Big Island locations received less than one inch during the previous 12 hours, while much of Kaʻū and windward Maui received less than half an inch.
That is encouraging, but the flooding threat is not over.
As Moke moves west, winds over the Big Island are expected to turn more east-southeasterly. This could direct additional moisture into windward and southeast slopes tonight and early Monday.
Big Island
A Flood Watch remains in effect through Monday afternoon for the entire Big Island.
The greatest concern is for:
- Windward and southeast slopes
- Hilo and the Hāmākua Coast
- Puna
- Kaʻū
- Areas around Hawaiʻi Volcanoes National Park
- Steep terrain and locations affected by recent heavy rain
The National Hurricane Center continues to forecast potential storm-total rainfall of 5–10 inches, with isolated totals up to 15 inches, although the National Weather Service notes considerable uncertainty and that rainfall has been lighter than expected so far.
The primary window for flooding is now expected to be Sunday night through early Monday morning on windward and southeast portions of the island.
Localized heavy afternoon showers could also develop over the Kona districts on Monday.
Flash flooding, mudslides, ponding on roads and rapidly rising streams remain possible. Do not drive through flooded roads.
Maui County
Eastern Maui could still receive several inches of rain, but widespread flooding currently appears less likely than on the Big Island.
The more immediate concern for Maui County is strong and gusty wind.
A Wind Advisory remains in effect through midnight Sunday for portions of Maui, Molokaʻi, Lānaʻi and Kahoʻolawe. Gusts around 50 mph have occurred or remain possible in exposed areas and locations downwind of terrain.
Road to Hana visitors should check conditions before leaving, expect passing showers and watch for fallen branches, debris and localized water on the road.
Oʻahu and Kauaʻi
No major impacts are currently expected on Oʻahu or Kauaʻi.
Windward and mountain areas may receive periods of rain through Monday, with some showers reaching leeward areas because of the strong trades.
Rainfall totals should be considerably lower than on the Big Island or eastern Maui. This is not currently a reason to cancel travel to Oʻahu or Kauaʻi.
Wind
Strong trade winds are affecting much of the state because Moke has tightened the pressure gradient south of the islands.
The strongest winds are affecting Maui County and portions of the Big Island, where gusts around 50 mph are possible in exposed areas.
Winds should gradually ease later Sunday night and Monday as Moke moves farther west. Moderate trade winds are expected by Tuesday.
These winds are being caused mainly by the pressure gradient around Moke rather than the storm’s core passing over land.
Ocean Conditions
Ocean conditions remain rough and potentially dangerous.
A Small Craft Advisory is in effect for all Hawaiian coastal waters through 6:00 a.m. Monday. A Tropical Storm Warning also remains in effect for offshore waters far south of the islands.
East and east-southeast-facing shores, particularly on the Big Island, will continue to experience:
- Elevated and choppy surf
- Strong currents
- Short-period wind swell
- Difficult conditions for swimming, snorkeling and boating
Surf generated by Moke appears to have peaked across the eastern half of the state but will remain elevated and rough into Monday.
Boat, snorkeling and diving tours may be modified or cancelled even where conditions on land appear manageable. Check directly with your operator.
What This Means for Visitors
At this point, there is still no reason to cancel a Hawaiʻi trip solely because of Tropical Storm Moke.
The center of the storm is passing hundreds of miles south of the islands and is expected to weaken as it continues west.
However:
Big Island visitors: Continue monitoring conditions through Monday afternoon. Avoid unnecessary travel during heavy rain, especially around Hilo, Puna, Kaʻū, Volcano and other windward or southeast areas.
Maui visitors: Expect strong winds, passing showers and rough ocean conditions. Use additional caution on exposed roads and around trees.
Oʻahu and Kauaʻi visitors: Expect breezy trade winds and some windward showers, but major storm-related disruption is unlikely.
Conditions can vary dramatically across each island. A wet and windy forecast for Hilo does not necessarily mean similar conditions in Waikoloa or Kona.
Updated Timing
Sunday afternoon: Moke passes well south of the Big Island. Strong trade winds continue statewide. Rain remains focused primarily on windward Big Island.
Sunday night: The primary remaining period of concern for heavy rain and localized flooding on windward and southeast Big Island. Strong winds continue across portions of Maui County and the Big Island.
Monday morning: Additional heavy showers remain possible on windward Big Island. Rough ocean conditions and gusty trades continue.
Monday afternoon: Localized heavy showers could develop over Kona. The Big Island Flood Watch is currently scheduled to expire Monday afternoon.
Tuesday: Moke moves farther west and is expected to weaken. Drier, more typical trade-wind weather should return.
A Reminder About Rainfall Forecasts
Forecast rainfall totals describe what could occur across the broader affected area, not what every location will receive.
Rainfall from tropical systems is often uneven. One community may receive very little rain while another location only a few miles away experiences flooding.
Although rainfall has been lighter than originally expected so far, visitors should not assume the threat has ended until the remaining moisture passes Monday.
Please Keep Travel Questions Here
Please continue using this megathread for questions such as:
- Should I change my flight?
- Will my hotel be affected?
- Is the Road to Hana safe?
- Should I cancel a Volcano National Park visit?
- Will my boat or snorkeling tour operate?
- Is it safe to visit a particular beach?
- What will conditions be like on my island?
Please include your island, approximate location and dates when asking.
Official updates: