🌤 Weather at Diamond Head State Monument by season
| Spring | Summer | Fall | Winter |
|---|---|---|---|
| 68–85 °F | 73–88 °F | 72–88 °F | 66–82 °F |
Each range runs from the coldest monthly average low to the warmest monthly average high in that season (1991-2020 climate normals), measured at Waikiki 717.2, 1 mi away, elevation 10 ft. Conditions at the park can differ from the station, especially where elevation differs — check a forecast before you go.
Diamond Head State Monument is a public state park in Hawaii near Honolulu. The park offers a peaceful retreat into nature for visitors of all ages.
Quick Facts
| State | Hawaii |
| Nearest City | Honolulu |
Location & Getting There
Diamond Head State Monument is located near Honolulu, Hawaii. The park’s coordinates are 21.2625, -157.8061.
Things to Do
Hawaii state parks protect some of the most stunning landscapes on Earth — from active volcanic calderas and tropical rainforests to pristine coral reef bays and dramatic sea cliffs. Activities include hiking through lush valleys and along volcanic crater rims, snorkeling in crystal-clear protected bays, swimming at world-class tropical beaches, surfing legendary breaks, camping in beachfront and forest settings, kayaking along Na Pali-style coastlines, stargazing at high-altitude sites, and exploring ancient Hawaiian heiau (temples) and petroglyph fields.
Best Time to Visit
Hawaii parks are a year-round destination with consistently warm temperatures (75-85°F). The dry season (April–October) offers the best beach and hiking conditions. The wet season (November–March) brings bigger surf on north shores, whale watching (humpbacks arrive December–April), and lusher waterfalls, though trail conditions can be muddy. Windward (east) sides of each island receive significantly more rain than leeward (west). High altitude parks like Haleakalā can be cold (below 40°F) — bring layers regardless of season.
Visitor Tips
Many Hawaii state parks are free to enter. About a dozen popular parks charge non-residents $5 per person plus $10 parking, and two Oʻahu waysides charge $7 parking; Hawaii residents enter free with ID. Diamond Head, Hāʻena and Waiʻānapanapa require advance reservations for non-residents. Camping permits must be obtained through the DLNR website in advance. Respect Hawaiian cultural sites — never remove rocks, sand, or artifacts. Many trails close after heavy rain for safety. Reef-safe sunscreen is required by law in Hawaii. Always check current conditions before hiking, as flash floods are a real danger in valley trails.
Frequently Asked Questions
Do I need a reservation for Diamond Head?
Yes, Diamond Head State Monument now requires mandatory advance reservations for all visitors. Reservations can be made online through the Hawaii DLNR website. Walk-ups are not permitted without a reservation.
Explore More Hawaii State Parks
Diamond Head State Monument is one of many outstanding state parks in Hawaii. Discover more parks in our Best State Parks in Hawaii guide, or use our Park Finder to search by activity, location, or features.
Wildlife & Nature
Diamond Head SM — Lēʻahi (Diamond Head) is a 300,000-year-old volcanic tuff cone — the most iconic landmark in Hawaii. The crater’s dry coastal shrubland and lava rock support white-tailed tropicbirds (koa’e kea) that nest on the cliffs. The summit trail passes through WWII-era military tunnels and bunkers. Humpback whales are visible from the summit (winter).
Nearby Attractions
Waikiki — 2 miles west. Honolulu — 5 miles west. KCC Farmers Market — at the base (Saturday mornings).
Nearby parks: If you have extra time, Waʻahila Ridge State Recreation Area is a short drive away, and Puu Ualakaa State Wayside is a short drive away.
🐾 Dogs & Pets at Diamond Head State Monument
- Pets allowed? statewide rule
- Pets are heavily restricted in Hawaii state parks: they are not permitted in pavilions, swimming areas, campgrounds, lodges, on beaches or wherever posted, and only limited areas allow them.
- Leash rule statewide rule
- Where permitted, pets must be crated, caged, on a 6-foot or shorter leash, or otherwise under physical restrictive control at all times
- Beaches & swim areas statewide rule
- Pets are not permitted on beaches or in swimming areas statewide
- Cabins & lodging statewide rule
- Pets are not permitted in lodges or campgrounds, so overnight accommodations are effectively pet-free
- Statewide exceptions statewide rule
- Rules vary by park and posting; effectively day-use only in the limited unposted areas where pets are tolerated
Are dogs allowed at Diamond Head State Monument?
Pets are heavily restricted in Hawaii state parks: they are not permitted in pavilions, swimming areas, campgrounds, lodges, on beaches or wherever posted, and only limited areas allow them. Individual parks can post stricter rules — check signage on arrival.
Rules verified July 2026 via dlnr.hawaii.gov. More: Hawaii state parks guide · Dog rules in all 50 states compared
Park Location
Plan your gear for Diamond Head State Monument
From our editorial guides, matched to this park’s activities:
