Conditions shape experiences.
The shot you nailed. The one you missed. The evening that turned into something unexpected. The trip that was worth every mile — and the one that wasn't.
WhichPhase is a free planning tool that brings weather, moon, light, and timing together so you can answer the question that actually matters before you go anywhere.
The sky, the light, the moon, the weather — they don't care about your plans. But understanding them before you go? That changes everything.
A sunset from a rooftop bar. Stars so thick they don't look real. Golden light on a city skyline you've been trying to get right for months. A beach walk timed perfectly. A camping night where the moon actually cooperates. A hike that delivers instead of disappoints.
Conditions are the difference between a moment you'll remember and a trip you'll shrug off. WhichPhase exists so you know which one you're heading into — before you leave.
For too long, the information that actually shapes these decisions lived in five different apps that didn't talk to each other. WhichPhase brings it together — free, for everyone, with no paywall between you and the call you're trying to make.
The astrophotographer who needs to know exactly when the moon sets and whether cloud cover will cooperate at 2am. The couple timing their beach walk around a good sunset. The hiker wondering if that elevation means rain at the trailhead and snow at the summit. The city photographer who knows that blue hour over a skyline changes completely depending on what the clouds are doing. The person who just wants a phone shot worth keeping.
The planner and the one who checks conditions from the parking lot. The seasoned shooter and the person who's just starting to notice that light matters.
If the sky has ever made or broken something you were looking forward to — you already get it.
Most real decisions aren't yes or no. They're go now, go tomorrow, try a different spot, or save it for a better night.
WhichPhase is built around that moment — the one where you're deciding whether the conditions are going to deliver.
More context before you commit means fewer wasted trips and more experiences worth having.
Moon phases, light timing, and astronomical data extend well beyond standard forecast windows. The weather side of WhichPhase stays focused on the near-term range where forecasts are actually reliable — but the moon and light tools let you plan weeks or months ahead.
Find the night when conditions align. Then watch the weather as it gets closer. Trip Planner is built for both ends of that process — the big-picture planning and the night-before call.
WhichPhase is powered by trusted public weather, astronomical, and geographic data sources — including the European weather model widely regarded as among the most accurate in the world. Full details on the Data Sources page.
Forecasts and conditions are always estimates. WhichPhase is built to sharpen your judgment, not replace it. The final call is still yours — and it should be.
Because conditions shape everyone's experiences. Not just people with gear subscriptions.
The hobbyist and the professional. The day-tripper and the expedition planner. The person who wants a great sunset photo from their phone and the one who's been waiting three months for the right lunar window. They all deserve the same information.
No tiers. No locked features. No friction between you and the decision you're trying to make.
Check before you go.