This is the short list of Hawaii conditions that actually change a trip: what is closed, what needs a reservation, where the water is unsafe, and what is worth re-timing before you go.
Updated July 23, 2026 Checked against official sources
VolcanoKīlauea back to Advisory — ep. 51 ended July 15; as of July 22 USGS forecasts episode 52 between July 26 and 30 (window pushed out a day as summit inflation stayed nearly flat)
ClosuresSeveral hikes affected
OceanHigh Surf Advisory up for all south-facing shores — surf building to 8–12 ft Thursday and may hold into the weekend
ReservationsBook key sites ahead
Check before you go
Three things to check the morning you head out
Conditions on the islands turn over by the hour. These three live tools are the fastest read on whether today's plan still holds.
Kīlauea's episode 51 came and went on July 15 — back to Advisory until the next round
Kīlauea's summit keeps its on-and-off rhythm. The eruption comes in fountaining episodes that last hours, not days, separated by pauses of a week or two — and episode 51 just played out on schedule. Fountains from the north vent started around 8:30 AM HST on Wednesday, July 15, peaked near 950 feet mid-morning, and quit abruptly at 4:46 PM after 8.3 hours. USGS dropped Kīlauea back to Advisory (yellow), and per HVO's final episode report no tephra was reported from any populated areas. The summit began re-inflating the moment the fountains stopped — the usual sign another episode is loading, and as of USGS's July 22 update the forecast window for episode 52 is between July 26 and 30 — pushed out a day because summit inflation has stayed nearly flat over the prior 24 hours. Since December 2024 they've arrived every one to three weeks, typically telegraphed by small lava overflows hours to days ahead, so if your Big Island days land in that late-July window, keep the live page open. It all happens inside Hawaiʻi Volcanoes National Park, which stays open 24 hours; between episodes the crater floor can still glow after dark, and overlooks and roads can close on short notice once the next fountain starts.
Kīlauea — Advisory (yellow), paused between episodesEpisode 51 ended abruptly at 4:46 PM HST on July 15 after 8.3 hours of continuous fountaining that peaked near 950 feet. HVO reports summit reinflation began immediately, which makes another fountaining episode likely — as of July 22 USGS forecasts episode 52 between July 26 and 30, with precursory overflows flagging the start hours to days out. Don't drive up expecting fountains between episodes; do expect crater glow after dark.
Mauna Loa — Normal (green)Typical, non-eruptive background state. Nothing to plan around.
Haleakalā sunrise needs a reservationSunrise entry to Haleakalā summit requires a recreation.gov booking, released 60 days out — sort it before you fly.
Closures worth knowing before you build a hiking day
A handful of marquee hikes and park roads are closed or restricted right now. Don't anchor a day around one of these without checking the live status first.
Haʻikū Stairs, Oʻahu — closedThe "Stairway to Heaven" is closed and access is illegal; removal work is underway. There is no legal route up.
Kōkeʻe Contour Road trails, Kauaʻi — closedSeveral Kōkeʻe contour-road trails are closed; the state-park campground is closed as well. Plan Waimea Canyon stops around it.
ʻĪao Valley State Monument, Maui — closed through July 31The state monument that holds the ʻĪao Needle is closed for safety-improvement work. DLNR's State Parks notice board now lists it closed until July 31, 2026. Parking, entry, the ʻĪao Needle lookout trail, and the botanical garden are all inaccessible during the closure, and no advance reservations are being accepted until it reopens. Leave it off any Maui plan before then — and confirm on the DLNR park page before driving over once reopening day arrives.
Diamond Head & Mānoa Falls, Oʻahu — reservations and trail workDiamond Head needs a timed non-resident entry reservation — book before you arrive. Mānoa Falls runs periodic DLNR trail-maintenance closures and gets slick after rain, so check the live trail tracker for this week’s status before you drive up.
Water conditions shift fast — read the day, not the brochure
Surf height and water quality can swing within a day. A beach that's glassy in the morning can be a washing machine by afternoon, and rain changes the rules entirely.
Summer south swells come in pulses — match the beach to the daySouth-facing shores — the Waikīkī and Poʻipū side — are in their summer swell season, when pulses of south-southwest surf roll through every week or two. Right now that season is showing: NWS Honolulu has a High Surf Advisory up for all south-facing shores across every island, with a reinforcing long-period south swell pushing surf toward 8–12 feet on Thursday (July 23) and forecasters flagging that it may hold at advisory levels into the weekend. That makes swimming dangerous — strong breaking waves and rip currents — so pick a protected beach or a north shore, which generally lies down this time of year, and read the ocean report before you get in.
Stay out of the water after heavy rainBrown-water advisories follow big rain — runoff near stream mouths and harbors carries bacteria and debris. Give it 24–48 hours.
Reef-safe sunscreen is the lawMineral (zinc or titanium) only — chemical oxybenzone/octinoxate sunscreens are banned. Here's what to buy before you go.
Hawaiʻi keeps adding entry fees, parking charges, and timed-reservation systems at its most popular spots. Several of these sell out days ahead, so they belong on your pre-trip checklist, not your day-of one.
Hanauma Bay, OʻahuAdvance reservation plus a non-resident entry fee, and it's closed Monday and Tuesday. Book the day you want; slots go fast.
Diamond Head, OʻahuNon-resident entry and parking reservations are required and timed — reserve before you arrive.
Waiʻānapanapa & Hāʻena (Maui / Kauaʻi)Both run timed-entry reservation systems. Hāʻena, the Kalalau trailhead on Kauaʻi, books day-use entry and parking through the state GoHaena system — reserve before you drive up. At Waiʻānapanapa, the day-use area, parking, and black-sand-beach access all remain open, but DLNR has suspended campervan camping from July 2026 through March 2027 while it builds a new comfort station — so if a night in the park was your plan, book a different base.
The recent news and planning pieces that go deeper on what's changing right now — closures, fees, rules, weather, and the calls worth making before you fly.
This page is refreshed every couple of days against the official sources — USGS / Hawaiian Volcano Observatory, the National Park Service, DLNR State Parks, NOAA / NWS Honolulu, the Hawaiʻi Department of Health Clean Water Branch, and HDOT — plus our own live conditions tools. We only post what changes a real travel decision: something you'd book, avoid, re-time, or pack differently. Conditions still move by the hour, so treat the linked official source in each section as the last word before you commit.
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Trade winds are strong right now, with high surf hitting the south shore today. Windward areas are seeing frequent showers through the weekend.
South-facing beaches have dangerous surf today through Sunday—stay out of the water unless you're an experienced swimmer. East-facing shores will build rough water by Sunday or Monday. The bigger picture is a tropical system, Fausto, heading our way. It's weakening but should arrive near the islands by Tuesday or Wednesday as a tropical storm or weaker system, bringing strong winds, rough seas, and heavy rain. The exact track is still uncertain, so check the forecast daily.
Get your beach time and water activities in today through early next week on the leeward side, where conditions stay calmer. Be ready to shift plans by midweek when conditions turn rough.
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Windy conditions across Maui right now, with trade winds gusting strong. South-facing shores have high surf today and will see another big swell Saturday and Sunday—the water's dangerous unless you're an experienced ocean swimmer.
Through the weekend, windward areas will get frequent showers while trade winds stay gusty. The bigger picture arrives midweek: Hurricane Fausto is weakening as it moves toward the islands and should reach Maui as a tropical storm or weaker system Tuesday or Wednesday. That'll bring rough seas, strong winds, and heavy rain. Track and timing are still uncertain, so check updates daily.
Hit the leeward beaches and snorkel south Maui coasts today through early next week, but stay out of windward and south-facing waters through Sunday.
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Windy conditions dominate right now with strong trade winds pushing across the island. South-facing shores have high surf today—dangerous water if you're not an experienced swimmer.
Through the weekend, those south shores see another big swell Saturday and Sunday, and east-facing shores will build dangerous conditions by Sunday or Monday. Windward areas get frequent showers. A tropical system—the remnants of Hurricane Fausto—is weakening and headed toward the islands as a tropical storm or weaker system by Tuesday or Wednesday, bringing rough seas, strong winds, and heavy rain midweek. Timing and track are still uncertain, so check updates daily.
Leeward beaches on the Kona side stay your best bet today through early next week, but avoid the water on the windward and south shores through Sunday.
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Strong trade winds are pushing showers across windward areas through the weekend. On Kauaʻi, expect frequent showers on the windward side.
High surf is running on south-facing shores today and will build again Saturday and Sunday—stay out of the water unless you're an experienced swimmer. East-facing shores will also see dangerous swell by Sunday or Monday. Hurricane Fausto is weakening as it moves toward Hawaii. By Tuesday or Wednesday it should reach the islands as a tropical storm or weaker system, bringing rough seas, strong winds, and heavy rain. Track and timing are still uncertain, so check updates daily through midweek.
Beach time on leeward shores works through early next week. Plan water activities for today, but be ready to shift if Fausto's track becomes clearer—conditions will deteriorate by midweek.
Created with AI from the official NWS forecast discussion · verify with NWS before heading out
