French Futur Simple: The Complete Guide

Open a French weather app the night before a trip and you might read Il pleuvra demain matin, mais il fera beau l'après-midi. (It will rain tomorrow morning, but it will be nice in the afternoon.) You already know aller plus an infinitive for the future -- je vais partir (I'm going to leave) -- so why does this sentence use a completely different verb ending, with no aller in sight?

That ending belongs to the futur simple -- French's other future tense, reserved for predictions, promises, and formal writing rather than casual plans. Skip it and you'll still get by in conversation, since aller plus an infinitive covers most everyday speech. But open a news article, a horoscope, a wedding invitation, or that weather forecast, and the futur simple is everywhere -- and once you learn its one fixed set of endings, you can read it with confidence.

Futur Simple vs. Futur Proche: Which Future to Use

French runs on two everyday future tenses, and mixing them up won't break communication, but it does change the tone. Futur proche (near future) -- je vais manger (I'm going to eat) -- is the default in spoken French for almost any plan. Futur simple -- je mangerai (I will eat) -- sounds more formal, and it's the tense French reaches for in writing: news reports, official announcements, contracts, and weather forecasts.

Grammar Note

• Both tenses can translate to English "will" or "going to," so the real choice isn't about meaning -- it's about register and certainty.
• Use futur proche for near-term, casual plans: Je vais appeler ma mère ce soir. (I'm going to call my mom tonight.)
• Use futur simple for predictions, promises, and formal statements: Je t'appellerai dès que possible. (I will call you as soon as possible.)
• Common mistake: assuming futur simple only covers the distant future -- it's really about formality and certainty, not how far away the event is.

Forming the Futur Simple: One Set of Endings, No Exceptions

However irregular a verb's stem gets (more on that next), the endings never change. Every verb in French -- regular or irregular -- takes the same six endings: -ai, -as, -a, -ons, -ez, -ont, which look almost exactly like the present tense of avoir (to have) -- a handy way to remember them.

For regular -er and -ir verbs, add these endings directly onto the infinitive. For -re verbs, drop the final e first: vendre (to sell) becomes je vendrai, not je vendreai.

Key Phrases

• parler → je parlerai (zhuh par-luh-ray) — I will speak
• finir → tu finiras (tew fee-nee-rah) — you will finish
• vendre → elle vendra (ell vahn-drah) — she will sell
• voyager → nous voyagerons (noo vwa-yah-zhrohn) — we will travel

[AUDIO: je parlerai] [AUDIO: elle vendra]

Grammar Note

• je parlerai / tu parleras / il parlera / nous parlerons / vous parlerez / ils parleront
• Common mistake: adding an extra e to -re verbs -- it's je vendrai, not je vendreai.
• Common mistake: treating the six endings as different per verb group -- they're identical for every regular verb, with no separate conjugation table to memorize.

Irregular Stems You Just Have to Memorize

A short list of very common verbs swap out their entire stem, even though the six endings stay exactly the same. None of these are guessable from a rule -- they simply have to be memorized -- but there are only about a dozen of them, and you'll meet most in your first year of French.

Key Phrases

• être → je serai (zhuh suh-ray) — I will be
• avoir → j'aurai (zho-ray) — I will have
• aller → j'irai (zhee-ray) — I will go
• faire → je ferai (zhuh fuh-ray) — I will do/make
• venir → je viendrai (zhuh vyan-dray) — I will come
• pouvoir → je pourrai (zhuh poo-ray) — I will be able to
• voir → je verrai (zhuh veh-ray) — I will see

[AUDIO: je serai] [AUDIO: j'irai] [AUDIO: je ferai]

Grammar Note

• The endings never shift, even on irregular stems: j'irai, tu iras, il ira, nous irons, vous irez, ils iront.
• Common mistake: building the futur simple from the present-tense stem instead of the irregular one -- je vais becomes j'irai, not je vaisrai.

When French Actually Reaches for the Futur Simple

Beyond formal writing in general, three everyday situations reliably call for the futur simple over the futur proche.

• Predictions -- weather forecasts and horoscopes: Il neigera dans les Alpes ce week-end. (It will snow in the Alps this weekend.)
• Promises -- Je te promets que je serai à l'heure. (I promise I will be on time.)
• Si-clauses for a real condition -- Si tu viens, je serai content. (If you come, I will be happy.) -- the si-clause stays present tense; only the result uses futur simple.
• Quand, dès que, and lorsque plus a future clause -- Quand j'arriverai, je t'appellerai. (When I arrive, I'll call you.) -- English's present-tense "arrive" hides a French future.

Grammar Note

• Never put the futur simple directly after si for a real condition -- si tu viendras is wrong; it has to be si tu viens, je serai content.
• Common mistake: translating a "when" clause with the French present tense just because English uses the present there.

Turn on a French weather forecast and you'll hear the futur simple in nearly every sentence -- il fera beau, il pleuvra, les températures baisseront -- exactly what this tense was built for.

Making Plans (and Promises) Like a Local

Picture two friends texting about the weekend, weighing the weather forecast against their plans.

• Léa: Tu crois qu'il fera beau ce week-end ? (Do you think it'll be nice this weekend?)
• Tom: Je ne sais pas, mais s'il fait beau, on ira à la plage. (I don't know, but if it's nice, we'll go to the beach.)
• Léa: D'accord ! Et s'il pleut ? (Okay! And if it rains?)
• Tom: On restera à la maison et on regardera un film. Je te promets qu'on s'amusera quand même. (We'll stay home and watch a movie. I promise we'll have fun anyway.)

Every si-clause here (s'il fait beau, s'il pleut) stays present tense, while every result (on ira, on restera, on regardera) and the promise (je te promets qu'on s'amusera) lands in the futur simple.

Practice Exercises

• Fill in the blank: build the futur simple of parler for nous: nous ___.
• Fill in the blank: Si tu ___ (venir, present) demain, je ___ (être, futur simple) content.
• Translate into French: "She will call you tomorrow." (use appeler)
• Multiple choice: which stem is correct for the futur simple of voir? (a) voirai (b) verrai (c) voyrai
• True or false: the futur simple endings change depending on whether a verb is regular or irregular.
• Translate into French, using quand plus futur simple in both clauses: "When I arrive, you will already be there."

Answer Key

• parlerons -- nous parlerons.
• viens ... serai -- Si tu viens demain, je serai content.
• Elle t'appellera demain.
• (b) verrai -- voir's irregular stem is verr-, doubling the r like several other common verbs.
• False -- the six endings (-ai, -as, -a, -ons, -ez, -ont) are identical for every verb; only the stem ever changes.
• Quand j'arriverai, tu seras déjà là.

One Set of Endings, a Whole Future Tense

• Futur simple adds one fixed set of endings (-ai, -as, -a, -ons, -ez, -ont) onto the infinitive or an irregular stem -- learn them once and they work for every verb in the language.
• Reach for it over futur proche for predictions, promises, and formal writing -- weather forecasts and horoscopes lean on it constantly.
• After si for a real condition, keep the si-clause in the present and save the futur simple for the result -- never for the word right after si itself.

Next time you check tomorrow's forecast in French, listen for the futur simple doing exactly the same job it does in a promise. Then head over to Passage's lessons on the futur antérieur and the conditionnel to keep building out your future-tense toolkit.