For many travelers, the most reliable window is the drier season from December through May, especially on west-facing coasts like Batangas, Mindoro, and much of Palawan. Offshore parks have their own timing: Tubbataha is seasonal and generally runs in spring to early summer. July to October can still be diveable in protected bays, but it has a higher disruption risk from monsoon rain, wind, and tropical cyclones. Water stays warm (often 26°C to 30°C), so plan around seas and visibility.

Tubbataha Reefs Natural Park is a regulated offshore destination that is typically open in spring to early summer and is visited almost exclusively by liveaboard. Trips depart from Puerto Princesa, so fly into PPS and plan at least one buffer night before embarkation. Book early because berths are limited and dates are fixed. Expect a park visitor fee (commonly listed as PHP 5,000 per person) plus standard trip add-ons like nitrox or rentals. Because it is remote, prioritize operators with strong safety procedures and oxygen.

Choose Coron if wrecks are your priority. It is known for WWII wreck structure and you can add lake days and viewpoints between dives. Choose El Nido if your group wants lagoon scenery, island hopping, and reef days that suit mixed diver and non-diver schedules. Many travelers combine both by ferry, but schedules are weather-sensitive so keep buffer time. Season matters: both are easiest in calmer months, while mid-year winds can rough up boat tours. Budget for local fees in both towns and keep receipts.

For a fast weekend, pick one region with minimal transfers. Anilao (Mabini, Batangas) is a common choice for macro and training, reached by road from Manila (roughly 120 km depending on routing). Subic Bay is another classic weekend, also road-accessible (about 122 km from Manila) and known for wreck dives. Arrange transfers through your resort or operator, arrive the night before your first dives, and carry cash for local environmental fees. If seas are windy, focus on protected sites and shorter boat rides.

Most Philippine dive regions are warm year-round, commonly around 26°C to 30°C. Many divers are comfortable in a 3mm full suit, especially in late spring and early summer. In cooler months (often December to February), you may hit thermoclines, and repetitive diving can feel colder below the first 20 m. If you get cold easily or plan long dives, pack a 5mm or bring a hooded vest. For snorkeling and lagoon days, a rashguard is often enough for sun and abrasion protection.

Amihan (northeast monsoon) generally aligns with drier weather that can make west-facing boat routes easier, while Habagat (southwest monsoon) can increase rain, wind, and rough seas on many west-facing coasts. The real impact is on small boats and ferries. If winds are forecast around 25 km/h to 35 km/h, expect more canceled crossings and choppy surface conditions. You can often keep diving by switching to sheltered bays and shorter rides, but build buffer time between islands and avoid stacking same-day connections.

Apo Reef Natural Park is offshore and usually reached by expedition-style boats from Mindoro, sometimes combined with liveaboard routes. Expect long crossings and weather-dependent schedules, so add buffer days. The park charges regulated entry fees that commonly differ for local and foreign visitors. DiveJourney lists a diving entry fee around PHP 2,860 (local) or PHP 3,530 (foreign) per 48-hour visit, plus separate non-diving fees and required guide services. Confirm current rates and inclusions with your accredited operator, and plan to pay in cash during park processing.

Most fees are local, not national. You may pay a municipal environmental fee, then additional sanctuary or site-specific charges (lagoons, lakes, protected reefs). In some destinations your resort or operator collects fees and remits them, while others require payment at a pier or tourism counter. Carry small bills in PHP and keep paper receipts accessible because they can be checked before boarding a boat or entering a site. For regulated offshore parks like Tubbataha and Apo Reef, fees are typically handled through the liveaboard or accredited operator as part of compliance.

Treat wrecks as an overhead environment, even if you do not plan to enter. Bring a torch, carry a cutting tool, and stay aware of fishing line and sharp metal. If you are tempted by penetration, get proper training and do not exceed your gas, visibility, or comfort limits. Good operators brief routes, silt hazards, and exits. In regions like Coron and Subic, stay conservative with depth and nitrogen loading so you have margin for unexpected current or delayed pickups. A surface marker buoy is useful for signaling in busy boat lanes.

If there is an emergency, start local and get professional medical guidance early. Use the national emergency number 911 for urgent help. For dive-specific advice and evacuation coordination, contact DAN and follow their instructions. On the water, local boat crews and the Philippine Coast Guard are key resources for search and rescue. Because the country is spread across islands, transport can be delayed by weather, so early oxygen, conservative decision-making, and rapid communication matter. Before your trip, ask your operator about their emergency action plan and the nearest recompression capability for your region.

Plan for domestic baggage limits and protect the items that would ruin your trip if lost. Pack regulators, dive computers, and camera bodies in carry-on when possible. Treat lithium batteries carefully: keep spares in carry-on, tape or cap terminals, and follow airline watt-hour rules. Put fins, BCD, wetsuit, and less fragile items in checked luggage, and expect extra fees if you exceed weight allowances. Do not fly with scuba cylinders. If you need nitrox or special tanks, arrange them with your operator in advance rather than trying to transport hardware between islands.

Pick destinations where the default day is still fun without diving. In Palawan, non-divers can do lagoons, kayak sessions, and island-hopping in El Nido, or viewpoints, lakes, and hot-spring evenings in Coron. Puerto Princesa supports nature day trips and river experiences. In Luzon, Subic works for a road-trip base with beaches and outdoor add-ons. The key is timing: plan shared boat days on calm mornings, then let divers and non-divers split during midday and regroup for sunset and food. Budget for local entrance fees and bring cash.